There may be a deaf church in your area. The only way to learn is to be around other deaf.
Videos are not bad, but they cannot correct you as you learn. Sign Langauge with other People who use it is a living language. Those who are learning will learn and evolve for lack of a better word. You just need to be with them. It is not a quick thing. Its a journey.
Saying "Where is your water fountain" is very difficult if you are just starting out and learning. However in due time with other deaf if you needed water you will have a thousand ways to get it in a timely use of ASL.