If there aren't any gripes as of yet with cosmetics or performance, not too much.
Make sure you have good tires goin first, very important, almost caused me to spill once or twice when I rode old crappy tires for almost 1000 miles till I got my stands in to get new ones.
If your previous owner didn't say (or you don't trust them) when the oil was done, assume the worst and do it. Only costs me $8 + filter (every other time) + initial MC stand cost. Very few tools necesary, very little time too (under and hour for the first time, 30 minutes after that).
Brake pads are important as the tires, though require lest maintance and are cheaper. If you are iffy on them, don't ride it out, get new ones. One hour and less than $100 has you riding new top of the line pads up front.
Chain good? Clean/lube/tighten/loosen?
Buy a manual, maybe MC stands (rear at least), and any tools necesary first, makes things better, faster, easier, but more expensive (less than a mechanic by FAR !).
I find doing maintance fun, as well as time and money saving.
Though I was pretty much a noob, I failed my first 2 MC endorsement tests, and that was after 1000 or so miles, and ~ 6 hours doing manuverability type practices, mostly after I failed the first time. I still find it fun to do tight turning and quick stops, though it is unbeleivably crucial to have them down pat without thinking. Practice more and more, get the test done asap IMO. Saved me from getting a ticked once for sure so far.