Tips for the LM CSM Rendezvous
The LM is in a lower (and therefore faster) elliptical orbit compared to the CSM, so that the LM can catch up to the CSM while also gaining altitude sufficient to properly rendez-vous with the CSM.
I just rotate the LM 180 degrees so it is pointing at the CSM, and they will rendez-vous perfectly.
My preference is to slow the LM on final approach to the CSM, which will get its orbit into a much more circular orientation (and I prefer not to screw with the CSM orbit unless absolutely necessary–it’s heavier and takes more energy to correct).
Just remember to re-circularize the CSM orbit (if it needs it) to prepare for LM jettison and TEI burn.