I was pharah main before i mained cree. Put ur E ability on the right click and hover with space, learn the projectile speed so u can hit things and whenever you see hitscans or so, you can rightclick on any wall or ground and after that just shift so youre flying pretty fast. There are much things u can do with that bounce, combine with ult and never fly in the full open area, always fly behind walls left and right. Watch some videos on youtube for more tricks