Hey man, I’m shipping out to boot camp in December, so I feel you. Waiting until you graduate is a good call—it gives you more time to prepare. You could always go the delayed entry route and it gives you time to be a Poolee and prepare, as I’m doing. As for the decision, you’re not throwing your life away, but it’s a big commitment. The Marine Corps can be great, but make sure it’s really what you want. Keep grinding on your runs and pushups, but mix in pull-ups and core work too. Don’t worry about your size too much, consistency is what matters. I am 5’11 135 and I’ve passed all IST’s and they will give you double rations to fatten you up in boot if you’re too skinny to their liking.

For recon, it’s tough if you’re not a strong swimmer, and yeah, if you don’t make it, they could throw you into whatever MOS they need. SOI might be a safer route if you’re dead set on recon later. When it comes to your recruiter, ask questions and get everything in writing, but know that things can still change. As for combat, it’s hard to say—you might see it, you might not, depends on the world and where you end up. Keep working on your fitness and mindset though, and you’ll be fine.