Seersha:
Touched and appalled also! The first thing I would suggest is to pray for the folks at you old church, THEY NEED IT, and that will take some of the burden off your feelings for what they did and allow you to move on.
Your at the point where playing with others would really benefit you. I don't know how or where but it really helps, and connecting on a musical level with others is an awesome feeling.
I took up the guitar at 47 and 3 years later play in a church band, it doesn't hurt having one of the others be an Elementary Music Teacher. I just know the same things she explains to me at practice were mentioned to a 7 year old earlier that day, Ha. Playing with others really speeds up the learning curve and is a blast.
FYI at our church you would have gotten a huge applause and encouragement all around.
As said above find songs that you really enjoy, modern songs are sooo great in the use of rising and decending volume and emphasis. Download the mp3, find the tabs and practice along. Learn to palm mute, where the stops are, find strum patterns that work, use all downstrokes, etc, all the things that really go beyond strumming to make the music real for you.
In addition to Jusinguitar try Free And Easy Guitar, he has a song list that he has lessons for.
You are more talented and musical than you think, you just have to bring it out.
Best of luck.
-Mike