First let me start off by saying congratulations on your baby!
I have had three c-sections. After each one I hated wearing those maternity pants, it is kind of depressing. But when you put everything in perspective, you don't have to be in them too long. Plus, I found that those pants were easier to wear when it comes to keeping your pants off your surgery line. Nursing helps a lot in getting back to your pre-pregnancy size. After each of my c-sections, I was able to get back down to my size. It wasn't easy but it is possible. Along with nursing and exercising I did Weight Watchers.
Walking is also good for right now. After your six weeks you can dive into more exercises. Take this time to enjoy your newborn and maybe do some research into the types of exercises you will like to do once you are ready.
As far as the other problems, I am sorry but I can't help you. I haven't had any of them. I am sure there are some other ladies on this site that can give you some helpful advice.
Good luck and stay positive, it is going to be okay.