You just brought back an old memory from when I was a kid. I was staying at a friend's house, it was late at night, and I went down to the kitchen for a snack. I was surprised to see that his grandfather was sitting there. He asked what I planned to do when I grow up and I said I couldn't think of anything. He asked me a long line of questions and his final conclusion was "Kid, seems like your options are to be a monk or a hobo."
I feel like this is scarily relatable to me in high school. One thing I hate to admit is that the only thing I found interest in school was reading Catcher in the Rye. This sounds autistic, but probably I was the one kid who took an unironic interest in that book because it seemed to perfectly reflect the same aimlessness I felt in my own life. I think that the teachers thought I was some basket case for skipping class to go on these long walks to nowhere. During these walks I would see people living their lives and working and think "why can everyone else find their purpose in life, except me". The problem is that I felt like I was an angsty kid surrounded by people who don't really believe in anything. I like to think that later in life I found my way and look back at those times with a sort of romanticized fondness, but I think I'm glad I more or less left a lot of that part of myself behind.
Just like the book, "life is like a carousel", you never really go directly from where you are to maturity. It's an endless ride that just goes around and around. You'll keep on continuously maturing as you go.
I'm in a similar boat. In my mid twenties right now, I have really no ambition in life and I pretty much never have had that much to begin with. I wanted to go into carpentry after high school, but that really didn't go anywhere. The most I'm doing right now is learning Polish as a second language on Rosetta Stone and volunteering at a library, though I'm planning on looking for a paid job around late July or early August. Thing is, I can't really think of anything I want to do as a job, and I can't join the military under any circumstances because of health reasons (not that I would want to join, anyway), but I feel like I don't really have any interest in any field, don't have any hobbies which I could turn into a reliable source of income, and really have no sense of direction.
I can't identify as a particularly wise person who can offer any sort of sage wisdom, but I can identify as someone who went through something very similar at some point in their life. After HS I felt exactly the same way, I felt like I had a lot of pathways that lead no where. I went to college, but dropped out at some point and spent sometime mopping around in a depressive haze for a while. During that time I spent a lot of time talking with people on Discord who were in a similar life situation as me. I'm not going to lie, it felt really good, but it wasn't exactly productive or beneficial to me in the long run.
What changed was I reenrolled in college, but now I started hanging out with a group of guys who inspired me to take up the field I had thought I was previously done with. Seeing someone IRL served as a practical example of what I wanted to be and really helped me establish a road map of what I wanted to do and set up goals on how to get there.
If you can take anything away from my ramblings at least take this. It's not over for you yet, but as time goes by it's going to get progressively harder to mold yourself into something you want to be. Learn to understand yourself are you the sort of person who can walk the path alone or needs to be in a certain environment in order to thrive? There's no wrong answer to this question. I always thought I was a lone wolf, but after more years of living I learned that I actually do better when the people around me have similar goals as me. If you currently have any relationships with people who are in a similar situation as you, this is difficult to say but, you need to invest less time into them or find a way to distance yourself from them. As good intentioned as they may be, if someone stuck in the hole with you, they probably don't have any intention of getting out of it themselves let alone helping you out of it. Find people who have an interest in seeing you succeed.
My tips for how to meet people who want to help you. Literally all I did was in class I looked for someone who seemed the most motivated and introduced myself. You'll find that people who actually want to help you are friendlier than you think. From there I just started meeting more people who are likeminded. Some of those people I would call my closest friends today.
You seem like someone with a good head on their shoulders to at least have an understanding of your situation. That's more than I can say of some people, but that's only the first step of your journey.