This is based on this reddit post which has absolutely fantastic information on how to do laundry. If you want more information on enzymes and specifically lypase, the author also has a Lipase List in a google spreadsheet.

Edit: the first link to the reddit post was an incorrect link. Fixed that!

Double edit: Not all steps here are necessary for every load. You don't always need to pretreat. Citric acid may or may not help your laundry chemistry, that's fully dependent on how hard your water is and what products you're using. I also personally don't separate by color but, I don't own many colors.