I will second everything said here. I will add a couple of things.
Don’t start out fresh with a tiny sling. They can be temperamental and difficult to raise in some cases. A juvenile is a good place to start.
Don’t start them out in too big and enclosure. Especially juvies, as it’s easier to track their feeding and they don’t have to hunt too far.
The best way to avoid being bitten, is to NOT handle your spider. They won’t enjoy it and there is a chance of both escape and death. If they are dropped from height, they can rupture their abdomen.
The Chilean Flame is considered a dwarf tarantula that on occasion will refuse food.