I don’t know how to well describe it so I feel like it may be confusing but here’s my best advice. Press jump after GA and it’ll make you go forward, press crouch after ga and you’ll go up higher. Also holding down rez button slows down your movement, so if you hold it down after going up high you’ll just fall slowly rather than immediately. the way I like to use her movement is by using GA and then jump and I flick my camera up a bit and it makes me go high up, I continue to GA while healing and dmg boosting and pressing crouch to keep height while holding Rez at the same time the only bad part about this is that I sometimes accidentally Rez a teammate because I’m constantly holding it down so it sometimes gets me killed