Talking to a recruiter today

I want my MOS to be 68W combat medic but I’m willing to look at others. I’m more than positive I can score high in the asvab. I’d appreciate any advice on what I should and shouldn’t do while going through the process of enlisting. I just don’t want to get stuck in a job I’ll hate, I know I can change my MOS down the line but I have a passion for the medical field. (I’m a 26 year old male, no kids or wife. Just trying to support my grandma and my mom.)