I feel useless

Hi, i previously talked about my life story and explaining my whole situation (if you wanna know it, *** it’d be nice to talk it privately) anyways, I just feel useless I’m a 17 year old male who as for now doesn’t do anything else other than stay in his house all day gaming, at the begging of the summer I had a job, I wanted to quit it and find a new one because the pay was just mediocre and they wouldn’t give me more hours, I then started working at a store, problem was it was only temporarily for the 4th of July and all that, when I stopped working on the 6th I started feeling so useless, I’ve been feeling this way for a long time but if it gets more noticeable during summer because I have NOTHING to do, I have 1300 on my bank account rn and even tho that’s a lot, I have to help my mom pay stuff every month so I just can’t chill as the money disappears, not doing anything productive for so long just makes me feel like a waste of oxygen, specially when I KNOW I have to work out because I’m too skinny and I need to be different so maybe I could have better chances at social situations (not like couple wise, just like get more accepted and not being made fun of over my skinniness) if I can’t do all the different types of summer activities teens my age do because I have no friends, like go to pools, parties, sleepovers etc, I should at least do something productive. But my useless *** can’t even do that…