I have a Devilbiss Finish Line 3, 1.3 mm tip which lays down paint pretty well. Reasonably priced..
Keep in mind the tip sizes differ for primer,base coat/clear coats. The paint data sheets will specify the size range required per paint system. You can switch out tip sizes.
Like Johnny N states clean dry air is paramount.
Not to preach but wear eye protection, the correct respirator and "tyvek" coveralls.
"Isocyanates" in the paint activator is odorless but can enter through eyes and skin in addition to you breath.
Take care of your lungs and knees...you will miss them some day.
Stay safe and have fun!!