Melissa — there was a discussion on gardening on the list a while back – you could try to search the archives . .
For a ‘hands on’ learning you could try your local extension service — they are great for information on a lot of different things. Our extension service has a Master Gardener program where people take the classes, get certified and go into the community to help people just like you 🙂
Maybe just starting small with some containers would be a good idea. You can grow most things in containers — just pick a veggie or two and go from there 🙂