Welcome to Music Banter Forum! Make sure to register - it's free and very quick! You have to register before you can post and participate in our discussions with over 70,000 other registered members. After you create your free account, you will be able to customize many options, you will have the full access to over 1,100,000 posts.
I'm a self-taught guitarist as well, I study theory to an extent but don't let it discourage you from starting a band as there are quite a few big-name guitarists that haven't spent a lot of time studying music theory.