So I create characters all the time but I have zero drawing skills. Something that has helped me to visualize and design costumes (which are as important as anything for superhero and villains) is Heromachine. Here’s a link: http://www.heromachine.com/heromachine-3-lab/
It takes a while to figure out just how much you can do with this tool, but after some practice you can make some pretty cool things.
Here’s some of my characters (for my own comic universe) I designed with Heromachine.
Doctor Lightning: https://www.wattpad.com/story/166570424-doctor-lightning-details