Just jumped on the probiotics Launchpad myself making homemade Greek style yogurt and the more powerful Kefir. Both are easy to make and cheaper in the long run.

I use the Instant Pot to make it but there a ton of instructions on YouTube for making yogurt without it.

Making Low Carb Yogurt in the Instant Pot
http://lowcarbyum.com/low-carb-yogurt-instant-pot/

Coconut Milk Yogurt - how to make
http://www.teamyogurt.com/posts/201...nut-milk-yogurt

Dairy milk kefir - how to make
https://www.thehealthyhomeeconomist...-to-make-kefir/

Almond Milk Kefir - how to
http://www.thealternativedaily.com/...ond-milk-kefir/

Good resource for learning about Kefir...
http://users.sa.chariot.net.au/~dna/kefirpage.html