I was going to say "raise bigger pre" but I noticed you have already started to figure that out. find the sweet spot raise size where you are going 3w max to flops (including yourself).
As for ranges, here is an easy clue.... if you get raised by some passive 1/2 player, it's going to be 2p+ nearly always. Always pay attention to the action when you aren't involved, and note the players (mentally obv) who will raise draws, or some players raise top pair also to "see where they're at."
The range is ATC, the deck. if they become aggressive, like C/R, they have 2p+ man, until proven otherwise. EZ game. It doesn't matter that the flop is Q-6-2r, they will have Q-6, 2-6, etc, or a set. Most live players have an element of fear in their game, and they will raise super dry boards frequently because they don't want people sucking out. People don't
bluff very often, seriously. If it feels "icky" you are behind most likely. You can adjust to players who raise less than 2p+, but only after you see proof they are capable of raising with less than 2p+. I mean actually seeing the hand go to showdown, not just strong suspicions they are out of line or they are
bluffing.
I hope this helps.