I don't have a LA but... my suggestion is also to keep a notebook/binder with list of thread types and batting types and fabric types and how you have adjusted tension for each item. Good reference for ending some frustration.
Machines confuse me a lot. When I use my walking foot on my DSM, I don't change the tension but when I FMQ on the same quilt, the tension needs significant adjustment. Go figure.
Also, take a break from it before you become too frustrated. Good luck