This is my routine to work on technique in the main exercises. It is a four-week base with three sessions per week, except for the leg exercises, which in this phase I work on once a week, the rest of the exercises have a frequency of 2.
I include those exercises by muscle group that work well for me, in my routine I do not include the Barbell Squat (mainly due to my age) and instead I practice the Horizontal Press.