Kombucha is not similar to yogurt, although many have reported that they have used kombucha as a starter for making their own yogurt.  We do not recommend this, as kombucha is already a living organism and would be difficult to contain within the milk.  If you're curious about making your own yogurt with kombucha, please use whole fat milk and leave out the starter tea.  Consider purchasing a yogurt maker and following the manufacturer's instructions. If you don't have a yogurt maker, pour the milk into clean mason jars, leaving about an inch of headspace.