You should reconcile these:

"I have always felt like the schooling system is not a place for me to thrive"

and

"I do love learning new things and concepts, but I simply feel like I am not the right person to do it because my thinking is just way too slow/limited"

Given these two statements, and the struggles you're going through -- why not reconsider/rethink the first statement? You don't have to pursue a degree, but some formal education might actually help you.