11b vs 11b option 40

Im fat again 215, 26yo, I can only do 1 pull up and maybe 5 push ups 2 mile will be probably 22. 5 mile is out of question right now. I can do a 2 minute plank.

My question is, do I train for 11b then enlist and work out while im in and become a member of thr 75th or do I train at home for a year and enlist as option 40.

Ive wanted this for years im just lazy asf but going to fix that.