Sometimes those small Eastern ethnic churches can seem uninviting, unfriendly to visitors, especially if the group there is very small and tight knit. Don’t take it personally. Introduce yourself or smile to a few people if you can. Stick to yourself the first few times, focusing on the service, praying to God.
I should also say other Eastern Catholic Churches have been very friendly to me though - people spot me as a newcomer and approach me.
Good luck - and again if you like the service go back - the people, at least a few, will warm to you. Be patient if you get a chilly reception at first.