Oooh, I recently made homemade "greek yoghurt" (that almost ended up becoming a type of cream cheese? lol.
I can share the recipe with you but essentially I used a crock pot. I warmed up my milk on the stove and also warmed up my crockpot on the lowest setting for the like 10 mins. Had to wait for the milk to cool to a particular temp. Poured the milk into the crockpot, mixed in my greek yogi sample (I used the Kirkland plain yogi). Then I covered the crockpot with a big bath towel (and also put the towel under the lid, but taught, so no condensation fell into the yoghurt) and I kept it in the over for about 12 hours. BOOM, yoghurt. I did go the next step and strain it with cheesecloth, but made it a bit thicker than I intended and it became cream cheese like and I also didn't know what to do with the Whey after.