you are very welcome! that curd on top is the fungal starter for compost IMO, it is proteins, fats, and enzymes locked up in there. also, if you are confidant in your skill, that is the starter for cheeses and yogurts. It is probiotics for the hoo mans, the dogs, and many of our other domesticated friends!
I am bad at the IMO collections. Except, from near compost piles or garden beds. so if you want to succeed quickly, start with that. It is however, not true to spirit IMO's I am making, or definition, As MY outdoor garden and compost pile have had many a cultured microbe added.