You’re not wrong in a general sense. Conservatives tend to want to keep things as they currently are, have an innate distrust of large societal or political changes, and have an extremely high respect for entrenched institutions. Liberals, generally speaking, are on the opposite end of those three items.
I think where you lose the plot a bit (and where some posters are calling you out) is that often what happens is that society progresses in a certain way (gay rights, for example) and then you have a period in which so-called conservatives are actually reactionary, fighting to put the genie back in the bottle. Often this reactionary activity is extremely aggressive, and liberals are left fighting a defensive struggle to “conserve” their gains.
Who is fighting the offensive on, for example, affirmative action? It’s not liberals.
I think it’s not a useful distinction, ultimately, because you can’t take a particular topic, determine who is on offense, and therefore know which position is the conservative or liberal one.