Personally I'd never do any painting inside my garage. Overspray goes everywhere/anywhere. It will attach itself to everything.
What does not becomes very fine dust that'll travel everywhere.
Keep in mind you cannot even see this.
Got kids & pets, paint is very nasty stuff and just would not do it in an attached garage.
I'd build something outside or as suggested find a booth rental etc.
Check for inflatable paint booths as well, there maybe someone in your area that rents one out.