First if all congrats on the decision, it was one of the hardest parts for me. I am only 2 months post op and I am back to eating normal healthy food. I just have to chew well and eat slow. When they say you should take a half hour to eat a meal they mean it. I'm not sure you ever feel normal but I promise you will not be on soft food for the rest of your life!!!
I haven't lost my hair, I think as long as you get in the recommended Protein you should be ok. As for loose skin my NUT endorsed the IT WORKS! Wraps which my sister actually sells.
The first couple weeks suck but I promise it's worth it to start feeling healthy and watching those numbers go down!!
Good luck, I wish you all the best!!