Need refreshing iced tea ideas?

I got diagnosed with prediabetes a while ago, so one of the biggest changes I made was completely ditching sodas and sugary drinks aswell as snacks. I’ve been trying to replace them with tea instead, now that summer is getting closer and I want something cold and refreshing without added sugar.
I’ve been drinking a honey scented oolong and I really like how naturally sweet and smooth it tastes but now I’m trying to figure out the best way to make it iced or cold brewed while still keeping that refreshing sweet flavor. Any tips or recipes would be helpful. I’m a pretty free person schedule wise, so I have time to try different brewing methods or add ins people suggest and give feedback on how I like them.