Glad you figured your version control problems out. However if I recall correctly GitHub is only free for repositories and you have to pay to have private repos for your team. This might have of course changed but just wanted to point that out.
When I last studied version control options I ended up using BitBucket as repository and SourceTree as GUI tool. They’ve been working great and BitBucket allows private repositories for free. Although I think there was some size limitation to repository but I’ve not hit it yet so it has not been an issue for me (yet ;)).