Tighten the cube until you can barely get any gap, then
practice
practice
practice
practice doing centers, scramble and do it again
practice doing edges, scramble and do it again
practice doing 3×3 solves on 6×6, scramble and do it again
practice algs (from whaever method you use) over and over
practice Last2Edges algs and both parity algs over and over





until your turning and control actually grow to become good enough to not have nearly so much trouble with pops and lockups anywhere near as often.
By that time you will orobably also be kich faster thanks tonall the different kinds of good practice ans solid time you invested with the cube in the journey to get to the Land of Progress
And make sure you're using a decent magnetic 6×6
I would recommend trying the YJ Yushi V2M 6×6, its less than $20
it has good anti-pop tech in the pieces, and its not a fast cube so it's easier to control