Am i cooked?

Im almost turning 19 and i dont have a job. Am i cooked? Im really introverted and i always want to bw alone and when i am alone im always on TikTok or listening to music. I don't know what i want to do with my life. Im not good at anything. I do play piano and guitar and have been for a while but i still wouldn't say im good. Im really dumb. The only reason i have good grades is because i simply do my work. I don't actually know anything that im being taught and im pretty slow when it comes to learning. Getting a job is something that i know i need and its something i want to do i just dont know what kind of job i want since i dony really want to talk to anyone. Im really broke and i plan to go to college but at this rate im not going anywhere with my life. Im just existing and everyday feels the same and im just living life doing nothing. I do have a construction class but im seriously dumb in there as well and i was thinking about doing trade school and im a 2nd year for construction but i barely know basic knowledge. Im only passing all my classes because i do my work. I want to do something with my life but i just dont know what to do. I just feel empty.