Great to hear. I’ll never hesitate to suggest the Personal Trainer’s Thread for those new to the biz, to get some general input on the do’s and don’ts:
Zoom, Facebook Live, and IGTV are the most common ways I’ve seen trainers do virtual coaching. My wife attends yoga classes via Zoom. I think @j4gga2 also started using it for his clients last year.
The most direct way is one-on-one, having the client setup a tablet or something in the corner so you can watch as if you were standing there, and then they can go through the session while you monitor and give realtime feedback rep by rep/set by set.