Yep, you are going to be a quick box builder. LOL My iron is probably ready sooner than 20 min. but I usually plug it in, get the kids, shave the head, etc so it takes a bit for me to get ready.
Yes, knock the bud off with the side of the iron.
Test the iron on a piece of wood to make sure you have a nice dark ring and you are good to go. I don't use any antibiotics on them but I have one friend that gives a shot of the tetanus antitoxin, but I only know one person that does that. You are burning so it is pretty darn sterile. The AluShield is a silver spray, like a spray on bandaide. You can get it at TSC, but if you use it cover their eyes when you spray. I know one person that doesn't like the spray, but most of my friends use it, as does the vet. But if you don't have don't worry, you will be fine without it. I wouldn't put anything on the burn that would make it soft, you want it to scab.
Wear leather gloves when you burn and you will be more confidant.