looks good, it is a learning process, and it is a lot of fun. i got home today and my mom stole one of my bags to use as a purse.
the sell 1 inch thick foam sheets at the craft store and at fabric store. thats what i use for for strap padding and to pad the back panel of some bags
but yeah if you can help it, sew the sides u last, they make the bag 3-d and very hard to work on at the point. i have forgotten stuff and gotten pissed about that before