I wish I were closer I would offer our paint booth also and or come help you out. Im a ASE painter and ASE collison tech and I-CAR cert also. I dont comment often in the body shop tech forum not really sure why.
Couple suggestions I have are:
Make sure all prep work is done correctly. Long list
Blow everything out very well with a blow gun prior to pulling the car into your booth.
If in the driveway/gravel wet down the area around the booth.
Plenty of ventilation/light.
Wipe down the car several times with prep solvent/wax and grease remover.
"When wet this also helps to see how well the bodywork looks". Don't go in a circular motion straight forward and up and down use lint free towels one to apply and one to dry.
Once in the booth tack cloth the car very well.
Pick up a throw away paint suite it will help keep you clean and the paint job.
Far as applying base/clear that is hard to explain over a computer im not sure on how much you know and dont know how much to explain. Have any questions feel free to ask.
Couple pics of some work I do just so you know this is what I do for a profession.
The 75' Grandville was smashed in the front The Terrain was a mess also.