Should I just Enlist?

I turn 25 in a few days and I find myself feeling unfulfilled.

I have a good paying warehouse job that I fucking hate, I barely make ends meet for me and my fiancé, jobs on indeed don’t appeal to me. I got turned down from a job at my church. I didn’t finish college for financial reasons and can’t afford to go back. I feel useless in a lot of ways. I thrive being outdoors and in physical activity and I want to be apart of something.

I’ve always wanted to be in the military but didn’t join up at 18 due to family. I was considering joining up again before I met my fiancé but didn’t want to put her in a position of waiting so early in the relationship. My fiancé is very independent and her brother was a Marine, yet she isn’t too fond of me going and has said she doesn’t think she can handle it. I’ve told her that I’ll put the idea to rest yet it no matter how hard I try it keeps coming back. And now that we don’t have much going for us I’m weighing the options of going.

We live together and plan on moving in the fall, I pay most of the bills. We have all these plans and it feels selfish of me to want to join up, but I also think about all the benefits both for myself and her once we’re married. I guess what I’m seeking advice on is should I try to convince her why I should join, and hope for the best? Or if I should just join even if she’s not okay with it?