Validator question

1. After becoming a validator node, do i need other operations to become a validator ?

2. Port opening problem after becoming a validator ? Is it only necessary to open P2P port?

3. How to view the reason for the node entering the jail?

4. How to fine for entering jail？

5. What is the impact after being punished？

6.What causes my node to go to jail?

1. How to avoid it?