I know this is easier said, than done, but just do it! Take what you know so far, put something together, and listen to the feedback the community gives you. That's basically what I did for my Sonic 3D Blast remix (that somehow got YES'ed).
Are you trying to make original EDM, or some VGM remixes? If you're going for remixes, then you will definitely have to find a way to incorporate more melody into your EDM, or at least use original songs to do not have much of a melody.
I'm in a very similar boat, since I am trying to expand from chill/jazzy/hip-hop remixes. Ideally, I would like to be able to combine a bunch of different styles to make stuff that people don't really expect, but at the same time, I don't want it to sound like a mess.
Maybe get with remixers that have a style that you would like to learn, and see what they do. Even better, do a collab with them.