A splint helped me a lot. Got one from the hospital, but needed a smaller one after a few weeks. It really helped keep everything in place and immobilized. Loose stretchy clothes. Definitely will need help initially. It's hard to stand up and sit down, almost impossible to do either while holding your baby. Good luck!
also... Sounds weird, but my OB suggested it (bless her), pressure just from clothes and underwear is uncomfortable initially. She recommended putting a clean thick maxi pad between your underwear and the incision. Also helped soak up any random blood or ooze as it healed.