Hey there
Sam's mum, I don't have any advise to give you regarding taming your hamster, I'm new to this too! All I can say is take on board what the others have said as it is likely to be sound advise.
What I can help you with however, is to put your mind at rest regarding the bite. I was bit by my hamster the other day, and it drew blood. I'm not going to lie, it did hurt, but the bleeding stopped quickly and with that the pain. Hamsters have small sharp teeth, and the closest thing I can compare it to is having an injection. Sure, it hurts while it's happening, but the shock is the worst bit and after that it's fine. It shouldn't trouble you afterwards, unless your skin gets ripped instead of a clean incision. I got bit on the finger tip, but was able to play guitar about 10 mins after it happened.
So, you've probably had worse pain in your life! Just take it easy and I'm sure you'll get there