There are no silly questions when they are asked in good faith! 🙂
As Uun mentioned, the Playstyle tab is 100% meaningless. It is the only tab that you can skip without the game prompting you to go back and finish during character finalization; it is just there to guide you depending what role you want to do. Click on Melee Damage and it will suggest Scrapper. Pets and it will suggest Mastermind, etc.
Controllers are pretty fun, they have a lot of tricks at their disposal. If you are torn between doing Support or Crowd Control, might I suggest Kinetics or Time as a secondary? They are both loaded with abilities that will buff you and your friends and greatly debuff the enemy.