To OP, if you like the game enough then try to work around your limitations like others have mentioned.
A larger resolution screen can help to see more of what's going on in a fight.
Setting up a comfortable UI will help a lot with reaction time.
After muscle memory training, a gaming mouse can be great because of key binding most skills to mouse buttons which reduces point and click time and keyboard management.
Choosing a class that suits your skill is an idea too. Bard can move and shoot so it could be a good option.