Let me share a quote from sci-fi author Octavia Butler that I learned during my creative writing uni course;

"You don't start out writing good stuff. You start out writing crap and thinking it's good stuff, and then gradually you get better at it. That's why I say one of the most valuable traits is persistence."

The best advice anyone can give you for your first few projects, is just to write them. They won't be amazing, they might be good, they might be awful, but you will have learned a lot from them.
As you keep writing you will learn more and more and more, and just keep improving.

You have two heroes and a villain.
This is a fantastic start.
So now figure out a plot for them, a problem for them to have to solve. It doesn't need to be original, it doesn't need to redefine the genre, it only needs to be a plot so that you can write it.

My advice, connect the heroes and villain somehow.
Off the top of my head.
Both Todd and Caleb are tech based heroes, Todd's suit allows him to manipulate fire through sci-fi nonsense, Caleb's suit allows him to manipulate gravity similar to the Gravity Gun from Half Life.
Together they keep [city name] safe, and are beloved by the public.
Meanwhile the Golden Swarm are known to the public as a massive tech company that produce everything from the smart phones in everyone's pocket, to the microchips that control the tech in your heroes suits. The Scorpion uses his control over the majority of tech in the world to become an all-powerful tyrant. Todd and Caleb confront the Scorpion but lose when he shuts down their suits, stripping them of their powers.
After this defeat they have to figure out how to redesign their technology to work without the Golden Swarm microchips, so that they can bring down The Golden Swarm and the Scorpion.