Is this possible?? Navy Hospital Corpsman?

Next semester of college will be my fourth semester. After 3 semesters of college, I found out that I'm too lazy to study. and I also have been thinking about join us navy. I have two friends in navy, one of them is going to be hm. so I have been thinking join them as well. so here is my plan,join navy for four years, go back to school with GI bill. then fo to grad school study for physical therapy after that working in va hospital. so here is my questions, is this scenario possible?? I mean beside try hard then anything is possible. And will the experience in navy help me at all? I mean like being a hm will the experience transfer toward college credits? Will this experience help me in my grad school application? And if I get in C school, what rate is closer to physical therapist? last but no least will i have a clean start after i return to college(im planning to go to another college). by clean start, i mean my grade, because, see here is another reason I will like to join navy, i just check my college transcript yesterday and its around 2.3, c + gpa. So hmm, can somebody help me here? thank you in advance and happy new year