There's an incredibly good Street Fighter V player named Brolylegs. The guy literally plays with his face, way better at the game than I'll ever be.

This is an unkind thing to say, I realize this, but if you are physically incapable of mashing two or three buttons for twenty seconds or whatever it is, you aren't capable of participating in combat at an acceptable level in FFXIV, and have been carried through every duty you have ever joined.

It sucks, but it's the nature of the game. You press a lot of buttons for your general rotation to just play your class.