Good on ya, the best way to learn is by doing it.
Reregistration is easy if you have the old plates and papers, just fill out a form show them a reciept from the previous owner and you're away.
It doesn't sound like there's too much wrong with the bike, if it's just been parked up you might find that with a fuel tank and carb clean it's a runner, especially if it's still turning over OK.
I had a bike that had been sitting for about 10 years. Cleaned everything out and filled it up with fresh gas, smoked a bit when first started but came right after getting hot and cold a couple of times probably rings stuck in their grooves, Checked compression after that and it was all good.
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