How does ANG work

I have a couple questions about ANG. Firstly, I have a summer trip that CANNOT be interrupted so I’ve been delaying my enlistment. My recruiter says if I join in March I shouldn’t be shipped to basic until August or September which wouldn’t interfere with my July trip. I would delay until then but I need ANG to cover my tuition ASAP and I don’t want to lose the job he’s offering me. Furthermore, I’m also wondering how often I will be forced into deployments. My main aspiration is to be a teacher and I wouldn’t want ANG to get in the way of that. I really do want to serve but only on a part time basis. So how often would I be taken away from my main career? The job I’ve been offered is Corporal Support Staff at Air Force Base Andrews.