Not a problem. In google: english-speaking guide in Georgia / Tbilisi. TripAdvisor help you too:
https://www.tripadvisor.ru/Attraction_Review-g294195-d6483398-Reviews-Tkemali_Tour-Tbilisi.html
https://www.tripadvisor.ru/Attraction_Review-g294195-d12635752-Reviews-Ge_Tour-Tbilisi.html
(english & german-speaking guides).
цитата: JankyLV
Or is it just easier to hop on a minibus and go by yourself?
Hmmm ... I do not recommend. For the first time in Tbilisi it is better to invite a guide.