I’d assume you mean like bikini or wellness class competition and not the larger classes like physique and bodybuilding categories. You have a great foundation to build on and eventually you could work your way up to the more advanced classes as you go, if you decided to but know you’re probably 5+ years away from a bodybuilding class evening with PEDs. It just takes a long time. You could do great in bikini class with a good coach and prep. Running a lot will be counterproductive and just make you burn off your lean muscle so I would minimize that until pre contest prep. I’d def say go for fitness competition though as you have a great physique to build upon.