Try and conquer the freaking out part - probably the hardest thing to do but if you can go into it calmly you will fair better
On super sharp turns I slow down and usually put the inside foot down as a bit of a pivot point
Eating it is sometimes just part of the deal. It happens to the best of us
If you had to figure out how to put a dropped chain back on, it's time to start looking up other mechanicals that can happen on your ride and how to remedy them. No shame in it - most of us may not think about how to fix a problem until we encounter it