Like one pocket high level of skill required. How do you get there? Practice of course and play games that increase you’re knowledge of the game of pool. Bank pool you have to make all banks clean and have to understand how thrown on clue-ball affects throw on object ball. Not all banks can be made straight forward due to the angle to narrow or wide to pocket. So, how do You learn this? Read up on subject, watch video’s, and play game that you have to bank and throw object ball.
You play full rack or 9 ball rack. First one to 8 or 5 is the winner.
Official rules on bank pool.
BankPoolRules