an ipad is just an oversized ipod touch (with a sim card possibility if you go for that option)
so no defrag/disk cleaning issues - yu sync it via itunes, and apple magic does the rest 
I am not at all techy/geeky, and didn't own anythign apple/ipod related until dd1 needed it. I have learnt the rest on the hop, as we go - she has upgraded form an ipod classic, to an itouch, and now an ipad.
I can do most things for her on her ipad - films etc are easy enough to get through itunes, or rip the dvds and convert. apps are great. the kind of net access she needs s mostly there, but we have come a cropper with a couple of flash issues (eg using Headsprout reading programme), but not a big issue really, as whenever we woudl be doing that, I can use my (Mac) laptop instead - either on home internet, or using my phone as a tether if we are away with no internet coverage.
the ipad is really low maintenance, imo - really is just a giant ipod.
I recently converted to a mac laptop, as I was bored of my Windows computers just giving up the ghost after 18 months or so. I ahve found it really easy - the few issues that have had me gnashing my teeth over how to do them have actually turned out to be me overhtinking it - the solution was there all along, but I was looking for a more complicated way of doing things!
you can always book tech time at an apple store to talk thorugh issues too (and I have found them really helpful if I just drop in with a quick query too)