You... can't. At least not here.

Lemmy.ml currently (and probably for the forseeable future) doesn't allow the creation of new communities. You could ask the admin to create a community for you, but I can't say more beyond that. I don't know if that's okay or not, I don't have an account on lemmy.ml.

Another alternative is to create an account on another instances that allow new communities and create a community there.

"create community"

I see you are posting this from lemmy.ml, so it should ve:
https://lemmy.ml/create_community

There should be a button on the top bar.

seems like you cant make on instance on lemmy.ml so i suggest you make a account on a topic related instance with an alt account

Worth noting that this is the fediverse, you don’t need to be on the latest instances if you’re not fond of their moderation policies (such as inability to create your own community). You can always sign up on another instance that allows for such, and (as long as it is not doing something egregious like allowing illegal content thereby getting themselves de-federated), you can still interact with content on yet another instance (as shown here I am commenting from a personal instance).