I am playing NL50z and am very confused about how to increase my accuracy with preflop spots. It seems most people have some chart they got from a coach who made it from data base analysis. Or they bought some monker range that has been solved for 500z.

I don't have either of these things and wanted to know what my options are. I don't mind buying monker solver, but am worried this is not the way to learn preflop. If it was, then why would people spend $1000 on a monker solution when they could just buy monker themselves?