Hello, currently in bronze and play support quite a lot but I find it hard to properly judge when to gank.
ADCs will often flame you for ganking as well so it’s hard to judge if in doing a bad call or if the adc is just an idiot.
Currently, I play Nautilus, Leona, Blitz and some Bard and usually try to gank when botlane is gone or mid is pushed up a lot.
As an ADC main, I’d say it’s important that the adc knows wave management at least to a certain degree to allow you to gank. If I see my support roam, I immediately let the wave push into me, in the best case I’d even establish a freeze.
Since most ADCs in bronze have no clue how this works, I just wouldn’t risk the tilt of your adc.
If you still want to go for it, wait for your adc to be ahead and then either go from base or move up there when the wave crashes into turret or your adc recalls.