Ttc help:(

For over a year we haven't used any method of protection and nothing. So we talked about after this period we'll get an opk and start ttc. But I told him we need to change stuff, like both of us stop drinking so much or at all, him to stop smoking(he only does when he drinks) and whatever. But he said he doesn't know if he's ready to do that, but he wants to try? Idk what to do about that. &that I've had no luck getting pregnant by now, I'm thinking there's something wrong&my mom&aunts have had trouble or not able to conceive. But idk how that works with getting checked if I can have kids, I've had a ultra sound a few years ago&everything was fine, I'm not 21 yet(in 7 months) so I haven't had a pap, but when I get checked she says everything is fine.&how much it cost to see if I can conceive. And how to go about that with my mother bc I guess she's trying ttc&she's 42... It's mostly my stepdad who's a few years younger making her so idk what she'll say about me getting checked since I haven't use anything. I just need advice how to go about everything and tips for ttc! And no rude comments!