All Olympic lifts are meant to be done very explosively. So you never want to use heavy weights that slow you down.Keep it fast and always maintain perfect technique. One quick move from knees to lockout. No pressing.
It’s hard to increase the weight on snatches so don’t rush it. You have to be consistent and patient. Using the same weight for a few workouts (or even weeks) in a row is a good idea. Once you have mastered it make the next smallest weight increase or simply add another set.
A life without snatch is a life not worth living.