I am high so this may not make sense

A few months ago when i was playing, i thought it had figured out how to analyze ranges. I was only half right, and the result of this was that in essence i only learned how to be a better "guessor" at my opponents' hand. In more specific terms, i was able to tell you many of the hands that might be in my opponents range, but couldn't rly tell you the strength of that range. I was analyzing each individual hand in the range but wasn't thinking about those hands as a collective.

I think realizing this is gonna help me out immensely, but im not sure how to gear my brain to quickly "weigh" a range during a hand. Tips/suggestions in this thread would be appreciated.