Weed smoker: if you're new to working on your bike, I strongly suggest you buy a shop manual - best $30-60 you'll spend on the bike, as it will save you in the future with various maintenance issues.
As for the oil and oil changing, if it's been sitting with dirty oil for a while, be aware that oil does become acidic with the contaminants it is designed to suspend, etc., you want to change it out as soon as possible, and if it is quite dirty, change it again soon after. Depending on your flavor, you may consider using a (relatively) cheaper oil such as Penzoil or Castrol 10w40 (motorcycle specific), then change it shortly after with either the same, or a pricier oil as per your preferences... but stick with a decent oil filter such as an OEM one, puralator, or ? DO NOT use Fram filters. - very poor construction. Next year, you may consider changing it with car oil before storage, then change it again after storage with bike stuff - it does react with the less than perfect conditions in your engine, and simply because you haven't put mileage on, it doesn't mean you can go for another 3-4000k with it. Good Luck.