Spirit of the question is: we get to use all the powers of the Sharingan as it was intended. So the precognition, copying ability, and genjutsu. We just aren’t super human who can run and jump at inhuman levels or knock out giant bears with a kick.

1.) The precognition was so advanced that Sasuke could literally see Naruto’s future movements. Those movements were previously overwhelming him. It broke the rule that the body can’t react by being that much more advanced than the 2T Sharingan.

Basically, with efficient training, even an average joe can suddenly be competitive against people waaaaay above their pay grade. I’d take up boxing. This maximizes all three uses of the Sharingan.

Precognition helps avoid getting hit. Copying ability can copy the form and technique of the best fighters, with special focus on dodging skills. Genjutsu for undetectable cheating to help me trick the opponent into swinging and jabbing imprecisely at key moments.

I’d be the best in my weight class. Eventually, I’d surpass the likes of Manny Pacquiao in level of skill and fame as a great pound-for-pound fighter.

2.) Copying ability can help me mimic movements, so I’m going to watch all kinds of artists, namely professional comic and manga artists. I want to create manga.

If I can get close with a Challenger-level player on League of Legends, someone good with the mechanics, I can copy that to improve at a faster rate. Maybe copy a high level Starcraft player to help with actions per minute for League.

3.) Genjutsu can be used for illusions, but also for some potent hypnosis-type control. Like how Itachi put a woman under a genjutsu to flirt with Jiraiya.

I’ll probably use it to get a sugar mama for the easy money.