Unfortunately, current user interface does not make it easy for someone not familiar with Lithuanian language to search the records. This site (which is not associated with epaveldas in any way) attempts to provide advice and additional information, allowing English speakers to find records there, at least to some extent.
It is important to recognize that the set of church books is not complete. They are working on scanning the books and making them available online, but not all the books held at Lithuanian State Archives are currently online. If you know the location and date of the event which interests you, and you are unable to find the records on epaveldas using instructions below, you might have better luck contacting the Archives to get necessary information. Records may also be available from other online sources, see Lithuanian (Roman Catholic) genealogical sources online" page.
See Office of the Chief Archivist of Lithuania website for information on how to request copies of vital records directly from the archives.
One of the complications is that records come in a variety of languages. Records from 18th century and earlier are generally in Latin, with Polish becoming prevalent at the end of 18th - beginning of 19th century. By mid-19th century all church books switched to Russian, as at that time most of the territory of modern Lithuania was part of the Russian empire. There is a short period during World War I when Lithuania was under German control, so some church records (and other official documents) from that time may be in German. In 1918 Lithuania declared independence, and from that point on the records should be predominantly in Lithuanian, apart from the south-eastern part, which remained under Polish control.
The records are generally not indexed, meaning that there is no way to just search for a particular name, one has to flip through the scanned pages in order to locate a specific record. In some church books an alphabetical list of births/deaths/marriages is provided at the end of each year, this makes search for a specific name significantly easier, as one can quickly scan such lists for many years looking for the matches. If alphabetical lists are not provided in a given church book, the only option, if exact date of birth is not known, is to scan through all records for the year(s) of interest, which may be a bit tedious.
First column typically contains the information about the date of baptism, the church, the priest and the first name of the baby, commonly highlighted by writing it in larger letters, or underlining. Second column contains information about the parents, including the mother's maiden name, as well as date and place of birth. Again, it is common to highlight the last name of the husband. Third column contains information about the godparents.
Original Russian text and word-by-word translation, matching the format to the record above:
девяностаго года ок-
тября четвертаго дня
въ Куршанскомъ Р.К.
Кс. А. Эйдымтомъ ок-
решен младенецъ и-
со всѣми обрядами
ской волости Кази-
мира и Евы изъ По-
совъ законныхъ суп-
руговъ дочь родивша-
яся сего 1890 года ок-
тября 1 дня въ дерев-
скiй съ А-
|206.||1.||4.||[In] One thousand eight hundred
ninetieth year [on] Oc-
tober fourth day
in Kurshany R[oman].C[atholic].
[by] Dean of it
Pr[iest]. A. Eidymtas [was] bap-
tized baby n-
with all rites
of the sacrament.
|[Of] Peasants [of] Kursha-
ny volost Casi-
mir and Eva of Po-
is [who are] lawfully mar-
ried, daughter bo-
rn [on] this 1890 year Oc-
tober 1[st] day in villa-
[of] Kurshany pari-
sky with A-
nele [, of]
If you are only interested in first/last name of the newborn, you can scan the records quickly for the highlighted first name in the first column, and highlighted father's last name in the second column, even if you don't know much Russian. It was also pretty common to write the last name of the baby (or the groom, for the marriage records) on the book margin in larger script, next to the complete record. This is very convenient for quickly looking for a particular name, as the pages can be flipped in the epaveldas viewer using the image rotation buttons in the top-left corner for quick reading of these margin notes.
Note that the names of the parents are usually written in the following order: [father's first name] [mother's first name] изъ [mother's maiden last name] [father's last name]. The names are written using Russian grammar rules, so don't expect exact match, your best bet is to look for something which sounds approximately like the name your are after. In order to do that you will need to figure out how to pronounce the name in the record. FamilySearch is offering a number of free online courses which may help with that, see the list of available classes for details. In addition, various genealogical word lists may come in handy:
Handwriting is likely to pose the most problems, but the above-listed guides can help with the script. Another problem is the Polonization, Latinization, or Russification of the personal names and surnames. For example, the surname Valinčius may be Polonized to Walinczow or Kleinauskas to Klynowski.
For personal (first) names, check out Vardų Žinynas (Name Reference). This page can help you translate the Latin, Polish, or Russian version of a name into its Lithuanian equivalent. Note: the page is ordered alphabetically by Lithuanian names, displayed in the right-hand column. It is split into separate pages by starting letter range, use navigational panel on the left to jump to the relevant sub-page.
For information on last names, see Lithuanian Surname Dictionary page.
For help with matching the old birth place name to a modern location, see Finding places in Lithuania.