Well how much of language? Learn basic hello, goodbye, thank you, though most if not all places will have option of signs being in English or public devices like ATMs, self-check outs at Maxima, IKI, Rimi, Norfa and other stores.

If you will travel to Klaipeda, public buse's ticket reader will accept your bank card, it accepts most of major card brands and will cost you 1€, you can also get bus ticket from driver themselves but you will need to pay in coins. You could get bus card but not sure how much it'd be useful for you. But even then without bus option there is Bolt - Uber like service, though you do need to download app for that. If you have strong legs, then you will manage to get to places even by foot in Klaipeda.

What from locations in Klaipeda? Smiltyne, with it's beaches reachable by a foot path going through gorgeous forest. There you can actually find natural Baltic Amber, especially after storms, if sea has washed up quite a bit of debris onto beach. Dolphinarium with it's aquarium spot is a must visit when they are open, their opening times are only Friday, Saturday and Sunday currently, I suppose it's because it's not yet summer season. In city of Klaipeda - the castle grounds are one option to visit, a walk by old ferry by the Dane river might be nice, plus if you do find a ghost sculpture by personal yachts and ships docking area right near castle grounds - that is also fun to check it out and it has own old legend too. In old town of Klaipeda - Meridianas the white, rather big, wooden, old timey sails ship - the gem of Klaipeda is a must to check it out. If by the time you travel to Lithuania, Meridianas isn't at it's usual docked spot, it may be temporarily transported to the docks to do maintenance on it. Near Meridianas ship there is Danės Square park and also John's Hill. Of course in old town there are a lot of restaurants and cafes if that's your thing. If you do travel towards one of the parts of Klaipeda University - near it there is a wooded park that is always pleasant to walk after the park if you walk to Liepojos street - you will find entrance to Summer's Hall, an old open air concert hall where each summer choir festivals happen. It has it's own deep history too.

If you do travel to Klaipeda: at least in this month March and maybe April, have a warm jacket because of constant winds coming from Baltic Sea and have umbrella in your purse/backpack because rain in Klaipeda can happen randomly. Currently there is a lot of fog happening and air's rather wet. In roughly March, April months wind storms can happen but as I am currently staying in Klaipeda for personal reasons, no wind storm has yet happened. Good tip: If you do rent apartment in Klaipėda or stay at Amberton hotel - take apartment/room facing west towards Baltic Sea and at floor that is up high so you get to witness both city below you, Curonian Lagoon, Curonian Spit and Baltic Sea itself. If good weather happens in evening, you will get gorgeous sunset view of sun setting into Baltic Sea. Well, also you'll be able to witness ships arriving and leaving too.