I use PPG 2021 as well. I shoot 2 coats, sanding with 1500 in between and then sand with 2000 on the final. I prefer to buff the clear, and although this is much effort and time, the results are well worth it. I use 3M rubbing compound #39002 to buff with followed with their hand glaze #39007. After 30 days or so you can apply wax.
The 2021 ain't cheap, but a novice can shoot it with good results. I just finished a Bandit and it looks absolutely awesome. This was my first time shooting automotive paint! The PPG system is basically goof proof.