Yup, it's just finding purchased tea around here that isn't flavored. I hear you can buy scobys too. Taste of the tea was strange at first but I got used to it pretty fast.You can make your own SCOBY from purchased tea. That's how I got mine going.
https://www.thekitchn.com/how-to-make-your-own-kombucha-scoby-cooking-lessons-from-the-kitchn-202596
Another thing I should get started on is sour dough starter, as I predict empty store shelves soon enough. Got plenty of cornbread mixes in the cupboard since my kids love that.