I play on PC, but I use an xbox controller. I just keep the keyboard (wireless) nearby to type. You can set macros to buttons for information you have to repeat (like at start or end of dungeons) which makes life easier. My brother plays PS4 and is fine, but he also has a wireless keyboard and mouse.

In terms of the time commitment, a couple of hours will be fine. It will just take awhile to hit lvl 50. But it is all about the journey, I just hit level 50, and to be honest the fun is in the getting there, so take your time and enjoy the story. You will hit end game sooner or later, whether now or in 18 months. The long build will make it worthwhile.

I am lucky as I got the NBN to the home, so that wasn't an issue. If I was living at my old house, playing would not have been an option as the connection was so bad. So not sure on that end.