2 stone isn't much - you should lose a lot of that really easily. You'll be amazed at how the scales keep going down for the first few weeks despite sitting around all day eating chocolate biscuits and watching daytime TV.
Usual diet rules apply for the last little bit. Don't go mad while you are BF and getting used to being a new mum, just aim for 1lb a week or so - cut out the rubbish and eat healthily.
Re C-section overhang, I didn't have one after my first c-section, but do after my second. Not sure what the difference is - maybe one more pregnancy, or a less skilled surgeon? It's tiny though, and only noticeable without clothes on. No biggie in the scheme of things!
I had a book called something like "C-Section Recovery", it had simple exercised to do from the day after your section - really gentle at first then IIRC taking you through to about 6 weeks pp, at which point the exercises were still extremely gentle but had got me in the routine of doing a tiny bit ever day.
Be VERY careful about wound hygiene after your C-section. An infection will set your recovery back (had one after DC1, they are quite common, recovery was much slower). 2nd time around I acquired a bottle of hibiscrub (from a nurse friend who really knew about these things) and washed with that all over before my section, and a couple of times in the days afterwards, did a few salt baths and dried my wound religiously with a hairdryer.
Don't feel too much pressure though to snap back into shape. It takes a bit of time, and the main thing is to have a lovely time with your newborn. Good luck.