This is a great question, we get asked this all the time. Petroleum jelly (Vaseline is one brand) is your healing wound's best friend. The additional antibiotics usually aren't necessary, and can actually make the situation worse by causing an inflammatory reaction and delaying the...
This is up to your treating physician and what type of closure method is used. Sometimes you need a graft or flap and that would require more restriction. Best, Dr. Emer.
It will take time for the wound to heal well. In the first few days after surgery a splint could help to support the nasal structure. In any case, it could need a small revision down the road.