During the training session and first few games I should make it a point to encourage them to do a few things for themselves
By all means, do so. You might even need to be a little heavy-handed and remind them that it's your job to keep the game moving along quickly, so if they can't click a button in a timely fashion, you'll take care of it for them.
In general I've found that to be quite effective: some players will relinquish rolling because they don't want
to learn, and others will spend the time to learn because for them it means being more involved. After a couple of sessions, you'll know which way each of your players is leaning.