For the thinner, I use 150 ml distilled water, 75 ml 91% isopropyl alcohol, 10 ml Liquitex Slow Dri Retarder and 10 ml Liquitex Flow Aid Flow Improver. I clean the gun with a 90 ml windshield cleaner, 90 ml distilled water, 50 ml 91% isopropyl alcohol and 10 ml glycerin mixture.
Experiment thinning your paint till it sprays the way you want it to. Start with 50% paint and 50% thinner.
Start with 20 psi for the pressure. It's a learning process with mixing, pressure, hand speed, distance, etc.
I like the Anita's brand of craft paint.