"fuck it, I'll just grab all achievements quickly. can't be that bad, right?"
some things are locked behind questlines and if you fail those quests you are now completely locked out of those things and if you wanted to get all sorceries/pyromancies/miracles/gestures/rings in the same run it'd take a meticulous amount of planning
also getting all rings means you'd need to go to NG+2 at the very least
nobody has made a route for that so screw it I'm just gonna go one at a time haha