Yes, go to school, but also learn by doing.
For starters, actors are a dime a dozen. Good techies are not.
If you show up to any summer venue and have some experience and it is not a union house, you're in. You may end up "lighting for food", but you'll learn a lot. Try to find someplace that switches shows/events a lot. The more shows, the more experience.
Learn to tech, hang, focus, assist the designer, and maybe someone might cut you a break.
"If my life weren't funny, it would just be true. And that would be unacceptable."
--Carrie Fisher