How to deal with such thoughts?

I've talked to the teacher and parents about my thoughts. I also do occupational therapy every Monday and Saturday.

Then I was told to join a community and keep myself busy with activities.

I want to join a community. But I have so many thoughts, like I'm not ready for college, I'm afraid of failing to be independent while in college and being a burden to my parents, I feel like my life is worthless, and I'm afraid of becoming a tool in a capitalist system that oppresses people.

Sometimes it's hard for me to enjoy or stay engaged with an activity. Idk my thoughts are messy and that I feel hopeless at times like idk why I'm here. So like, how do I deal with such thoughts?