I would check out Sara Lawson's website -
www.sewsweetness.com - she has excellent bag patterns - she has two books out and has published a couple of free patterns on the web too - she is an excellent handbag teacher. I learned by making bags from her patterns. Also, check out videos on youtube - you can see almost any technique that you need on there - I have learned everything on the internet - I had no sewing experience and am self taught - I think you did a wonderful job just winging it.