I turned 17 this week and recruiters getting paper work ready

So I graduated high school at 16 years old and I turned 17 and decided I was going to enlist in the Marines, and my mom supported me 100%, im goin in for my MEPS Monday morning and I’m really physically fit, I played football for 2 years and I’ve been working as a full time shower installations apprentice, given all this what should I be prepared for? And when would I realistically go out to Parris Island? What was your experience?