Ready for TTC but hubby isn't

Okay, so I'm in my early 20s and my husband and I have been married a little over a year. I'm halfway through my college degree and we both have an income and are in a rental house. I've been diagnosed with PCOS since I met him and all I've ever wanted is to be a mom. We have this sort of deal when after I turn 22 we're going to start actively trying. I want to start trying now but he's super against it. So basically we're just not trying, but not preventing, as he doesn't use protection. I don't even know what to call how I feel about it in my head. I guess I just need an outside perspective on what exactly I'm doing and how to get over having to wait. Thoughts?