Start with what you're comfortable with. 3rd person narration makes everything seem a lot less cringy and lots of people stick with that. (Speaking in your character's voice seems kind of rare, tbh) I would also recommend using a more tactical combat focused game to start so you've got something kind of gamey to cling to. D&D 5e, Pathfinder 2e, Lancer/ICON, Mythras... There are a lot of games out there to try.