Spam skills don't wait for fury. Unless any dismount skill chance is in some way enhanced.
Use WASD AND Mouse steering together, practice following a friend like a game of tag. W/S are key for not over running your target in a dog fight.
Ofc ditch the n00b control method; stop on release, and setting speed with Insert key. It's Cross Country not Dressage - Never going to improve with those choices.
Know the targets, range and area of effect of the skill you are using - minis, captains.
Open up the camera view, maybe turn it on to the target when circling.
Make a tooltip for notable npcs with H key to select them if you need to find them again. Also shows their health if you need them to take the brunt of attacks initially.


DON'T PANIC