Not everything we do has to make sense.
Here is an exercise where you can practice your right/left hand coordination, as well as to release yourself from the notion that everything has to be familiar.
In this exercise, you play ANY notes you want on the left hand, but the trick is to play them clean and accurately while picking them with your right hand cleanly and accurately as well. Up and down, over and sideways… doesn’t matter as long as you develop your coordination between the two hands.
I do this all the time and it really helps when I want to play a melody line or solo. Check out the video and let me know what you think.