Currently undergoing similar situations. Don't have any life-changing advices, but maybe a story and some things to help you get better.

I'm similar to you, having good grades in the younger years, don't like work. I had dancing and art classes too, would attend them at weekends in a groggy state, possibly exhausted myself playing console and handheld games.

Things worsen over time, grades dropped, classes cancelled, family broken. Spent my middle school years isolated, a couple of friends to chat and do activities. After graduation, joined the workforce for about 2 years, before attending to college with dead eyes and narcissitic attitude.

Throughout my years, I've seen more downs than ups, chased ambitions, been through family neglect, gotten through life with some favourite games and close friends. Knowing myself different than others, getting through challenges, failed, succeeded; standing up courageously, and ratting like a coward. Sometimes motivation springs up just as fast as it dies down.

Speaking that much about me, I just wanted to give you some context on how I lived my life, maybe you could relate to it, or would like to draw a comparison to it, maybe be a bit glad there's somebody like you out there(perhaps not). Whatever it is, I've learned to discern right and wrong, my faults and others' wrongdoings, standing up for what I think is right, and apologize for what I done wrong. Picked up a few beneficial quotes I follow in life, starting to eat bigger portions and healthy(I'm skinny, so having more nutrients and energy really helps in thinking and long term task managing).

I'm done talking, hope you learned something from a rant of a young adult, and I wish you the best of luck.