A breakdown:
Gender identity and expression is totally arbitrary. My teacher in our local community center pottery class is "manlier" (see: acting in a more traditionally masculine way) than her own husband, and I've met him a few times, he's fairly manly and also does bridwatching- ANYWAYS.
I am so glad you want to learn about queer identity! Look, first of all, there are some stereotypes, especially relating to sex, but I won't get into anything explicit here because notebook.
There's a general assumption mainly due to a lot of dubiosly-ethical porn that there's a more dominant, "masculine", "top", and then a submissive, "feminine", "bottom" but that's simply not true. While that can be the case it's a gross misrepresentation of actual gay relationships and a harmful stereotype. While it can be done with nuance, it's best to not really deal with that if you aren't a gay man yourself.
Honestly I recommend asking around, talking to gay men and learning about the community, as well as reading blogs made to answer people's questions on the subject. Just make sure that they're credible, meaning run by a gay man invested in the queer community, and to figure out how gay culture is different based on race, age, country, occupation, religion, family background, etc. as well as knowing what stereotypes to avoid (some gay men do fall into stereotypes! But if you wanna even touch anything remotely stereotypical DO IT WITH NUANCE. DON'T MAKE A BLAND CARICATURE OR I'LL STEAL YOUR KNEECAPS).
Anyways if you have more questions I'm happy to answer them! I'm not a gay man myself and while I am transmasculine, I don't really have the same experiences and my info can only go so far.