Do It! but get your degree first and enter as an Officer. I finished my first year of Law School and joined the Air Force to pursue a dream (I was single) these 2 quotes inspired me.
"You can't steal second, and keep one foot on first base"
"Most Men lead lives of quiet desperation"
I didn't want to be one of the thousands of people I meet every day who tell me how much they wanted to Fly, Join the Military etc etc but "You know I got married and kids" Now he sells insurance, mortgages, farm supplies, surgical tubing etc...Lives of quiet desperation. Shoulda coulda!
Good Luck!