Kiara did cover some things. There's a hardware mouse option in the game config outside of the game if you're a keyboard user that would help immensely. But the game as a whole still has some delays to it because of the user interface being on the server side of things.

I'd wait about a couple weeks (at best) before getting back into FFXIV. Patch 1.18 is coming VERY soon and it will start changing many parts of the game as we knew. There will be a battle system overhaul, leve overhaul, more new features, and some other things I think would be best if you waited to restart on.