1. Find the software in China and practise it yourself.
2. There are some basic rules but I don't think that it important. Practise makes perfect.
3. I don't know if it is taught in OU or CU.
4. A kind of free journal "circuit" is very helpful.
I assume you are talking about PCB layout. It is a kind of 'labor job'. I don't like it myself but it is a good profession, very stable and profitable.