My biggest suggestion would be to just take a good long look into the Power Sets and Archetypes and just try something that feels right or interesting.
In the end you can have a ton of fun just playing every Power Set Combo in the game, and at least for me, a large chunk of the fun is in making characters and leveling and exploring the world with them while they become stronger.
But in terms of advice; Enhancements are everything! -- Don't make my youthful mistake, they are essentially the gear of other MMORPGs and make a huge difference in how each and every power works and can really make your build something magic with a little experimentation.
In the end, be creative, have fun, enjoy Paragon City! ❤️