There's the Social thread to talk about stuff :derp:
Also Monoprice is cheap as fuc and everyone says they're the best thing since sliced bread so.
Haha, looks like you were right, had some trouble finding the thread again, thanks for the hint and thanks to whoever moved the thread!
Anyway, sorry for answering so late, thanks a lot for all the answers, everyone!
It looks like I managed to understand the basic approach, so all that's left is a choice which seems to involve either Wacom (which I had previously seen on Amazon) and Monoprice. I have yet to dig through all the reviews, but in general, it seems like the additional software (additional to any software that might be delivered along with the tablet depending on my choice) might wind up being more expensive, depending on what I decide on.
For the start, I mainly want my sister to get used to some basic workings of computer drawing and figure out if this is what she wants to do. As Biohazurd pointed out, it's different from drawing on paper, so it might not even be her thing, which would be annoying after a more expensive investment. Basically, the tablets that come with additional software, even though it's not overly complex, would still retain quite a bit of value given this situation.
General question, assuming it's not my sister's thing to draw with drawing tablets - do any of you have any experience scanning pictures and any recommendations there?
What's more, the screen resolution, in how far does it play a role when using a drawing tablet?
Thanks again for all your input so far, I greatly appreciate it!