TTC for dummies

Hello everyone! My parter and I are wanting to start TTC in December/January. I’ve just bought some opk’s and downloaded the premom app and started testing yesterday (the day after my period). But I have absolutely no clue as to what i should be doing over the next few months. I am plus sized, although I have lost 30kg this year in preparation if that makes a difference.

So basically I’m asking for a TTC for dummies guide. Tips, tricks, supplements? I’m clueless! Any advice is greatly appreciated🫶🏻