good for you Max!
Even though I haven't used one, nor did Chris, I know that the trick is truly, lots of small sessions. Long ones will be so tiring on your eyes, and will make it less fun and more like something you don't enjoy.
@Patrick, such a good point about becoming tense.
I'm glad you are able to get well used to this before you lose your hand ability with technology completely, it will make a huge difference.