You really don't need to worry about cleaning out temp files and most other PC maintenance sorts of things. Mobile operating systems like Android are much lower maintenance. Just accept OS and firmware updates via notification (you'll receive a notice on your tablet when one is available) and you're generally good to go. The only time you need to worry about clearing out hidden system caches like the Dalvik cache is when the tablet starts terribly misbehaving after an OS update. But that's a fairly uncommon issue.
As for tutorials, I'd google for android tutorials for beginners and check out the results.