It would be fine to drink but it could taste a bit off. Seeing yeast colonies this early indicates (to me anyway) that the yeast/bacteria balance has shifted more towards the yeast. Since your scoby is so young, there isn't a very large population of bacteria and it looks like the yeast are taking over. If you give it some time and change out the KT regularly everything will balance out. It'll just take some time. The older the scoby the better the KT tastes, to me anyway. Some of the best stuff I ever made was with black tea, straight white sugar and my oldest/thickest scoby. At the time it was about 1 year old and nearly 2 inches thick. Oh and by the way if the yeast trip you out just take them out, like I said they're not harmful but I'll admit they look gross.
Primary - JAOM, and JABOM (B=blood)
Secondary - En Primeur Pinot noir
secondary - empty :(
bottled - T'ej, Apricot dessert wine, skeeter pee
misc - long term storage of Kombucha SCOBY's and water kefir grains; Sauerkraut and Kimchi on deck