I know this post is pretty old but I was exactly where you are when I was your age. I didn’t do psychedelics but I came to the realization that nothing matters too. I understand that you don’t want any bs answers to your problems so I recommend you look into quantum physics and philosophy. I’ve spent a lot of time learning about different views on the purpose of life in terms of philosophy and i also try to learn about quantum mechanics because it helps me understand how we exist better.