If you switched to tablet recently, it's totally normal to have this kind of problem at the beginning. Relearning how to aim with a new playstyle you're not used to is not an easy task to do. Therefore, it would be wiser to play low SR maps first, and then climb up all the way to where you used to play with mouse. It will help you find a comfortable area/grip for you.
It won't just take a few days to become good at tablet, so don't focus on pp for the moment. More importantly, regularity is an important factor if you want to have daily improvement. Add to that
KS Wicher's advice about the type of maps you should play, and you will develop enough muscle memory with tablet to return to your highest level with mouse.