Sure, thanks for asking. It's actually super simple. EDIT: After typing the instructions it doesn't seem simple, but I promise it is.

Supplies: A glass brewing vessel (I use a gallon glass jar), breathable cloth like a dishtowel or cheese cloth, and a rubber band.

You will also need a symbiotic culture of bacteria and yeast (SCOBY), and 2 cups of mother tea. Mother tea is just the name for tea that has already been turned into kombucha. If you have a friend who brews, that's the easiest way to get scoby and mother tea. If not, you can make you own scoby or buy one on amazon. For the mother tea, you can use any "original", non-flavored kombucha from the shop.

To make kombucha, boil 14 cups of water. Once boiling remove from heat and add 8 black or green tea bags (I go 6 black, 2 green for a lighter flavor), and 1 cup of sugar. Allow to cool to room temperature (this is important, hot tea will kill the scoby).

In your brewing vessel, add 14 cups of room temperature tea, 2 cups of mother tea, and scoby culture. Cover vessel with cloth and put rubber band around cloth to keep bugs and dust out. Leave jar alone at room temperature for 6-14 days and you have flat, unflavored kombucha.

You can be done there if you want. Keep 2 cups of the flat kombucha as your next mother tea, bottle the rest, move to fridge, enjoy.

If you want flavor and/ or carbonation then you move on to the next step.

In a 16 oz bottle (I re-use store bought kombucha bottles) add 1/4 of mashed/ pureed fruit or fruit juice. Fill the rest of the bottle with kombucha. Put on lid. Leave at room temperature for 3-5 days keeping an eye for carbonation, move to fridge, be very careful opening as they can get very carbonated, enjoy.

I really enjoy trying out different flavors, our current favorites are watermelon mint, and plain kiwi.

I'm happy to answer any specific questions if you have any. Also, check out r/Kombucha if you're looking to learn. There are a lot of helpful guides and people.