How soon before ttc did you discuss wanting a baby?

I hope this makes sense. I have a timeline in mind of when I want to start trying for a baby (in just over a year, ideally I'd also like to be married before the first child, but I don't see him proposing anytime soon). I've been with my fella for about 2 years now and we've both said we want kids, but that was it. I would like time to prepare my body (vaccines, losing more weight, taking supplements, getting a check-up, etc.) I have already started losing weight and taking some pre-natals just in case. Also, I'm aware life doesn't always go according to plan 😏 and that I probably sound a bit crazy with this...