If you're interested in learning more about the subject, here's a good video about the use of AFAB/AMAB as a replacement gender binary: https://www.youtube.com/watch?v=Nv1byknT_jU

As far as the rest goes, yeah, it's difficult for a straight dude to be sexually and / or romantically interested in queer women and nonbinary people. The main thing to look out for is to leave people who identify as lesbian alone, none of us want to be approached by men in this way. Stick to trying to date bi / pan people and don't be an ass about it. When we're talking about a lesbian who may actually be a little bit bi or make an exception once in a while, actively trying to be that exception or even "fix" her will automatically and completely disqualify you and make you the potential subject of a vent post on r/actual_lesbians. pls don't be that guy.

When you're dating a trans person, you need to be aware of the fact that our bodies may be subject to change and that it is exclusively within our agency how we want that to happen. Bodily autonomy and the fight against being gatekept and doubted in the legitimacy of our gender identity are the central struggle of many trans people. In the case of transmasc people, in this context meaning: people who undergo physical changes masculinizing their body, this means that the cute butch looking person you developed a crush on may at some point grow a beard, get male body odor, may experience changes to their genitals, that they may be extremely uncomfortable with their chest being touched until they get a mastectomy, that their hips and butt are a constant source of dysphoric pain and insecurity for them and so on. It may mean deciding on he / him pronouns and being referred to as your boyfriend at some point, which frequently causes problems when cis dudes not used to queering their sexuality have to refer to him in such a way in front of their straight friends. Dating transmasc enbies when you're actually straight can and frequently will lead to the realization that you're simply not gay enough to maintain a relationship with them. All of these are actual examples from the dating lifes of trans men and transmasc nonbinary people i know personally, this is extremely common and very painful to them. Almost every trans dude and transmasc enbie i know has at least one awful, transphobic, manipulative boyfriend in their past. It's both horrible and super widespread. There's problems with transmasc NBs dating cis lesbians as well and they are often not that dissimilar, but i'm sticking to how queer women, fems and transmascs read as women or woman-aligned struggle when dating cishet dudes because that is what is relevant to what we're discussing here.

I could go on with trans women and NB transfems, but i already talk about our experience with chasers a lot, so i'll leave it at this.