First I would make sure to be comfortable with all of his special moves. once you can do all his specials consistently, and on command, I would practice doing the EX version of them to see how they change. The I would do the same thing with his combo strings. Some strings I would look into are b2, b22, b321, f23, and f14, as those are some that I use the most. Also d3. Get a feel for their range, so when you are fighting you have an idea of where you need to be in order to hit them with those strings. This will come with time, as spacing is one of the hardest skills to master, so don't get frustrated if it seems daunting. Play around with his tele to see what options work where. And finally, watch and rewatch PL vs MiT fatal 8 set, or as much high level Kung Lao game play as possible. Imo that's the fastest way to learn how to apply a characters tools.