Often I see that there's a new feature, and I'm interested in it, but my options are do the demo now, or hide it. But I want to do it later! I'm admittedly terrible at operating GUIs, so maybe it's just a me issue

I want that too. Most of these tours interfere. A pattern I like is just a little dot indicator where the new thing is. It's not in the way. But if I click the dot, or it's menu item, then I see the tour.

Don't get in my face when I'm trying to get task done. Ain't nobody got time for that!