Best thing you could do is strip all bodywork off and get that tank emptied and start working on changing oil etc . With a change of fuel and all other fluids and a new set of plugs etc it may just fire up with new fuel . Make sure you buy the best battery you can .
could do with using copious amounts of wd40 and scrub it spotless . Pump the tyre up just to stop it falling over off stand too .
of course if you tire of it I’d be willing to have it 😀
seriously dont rush it . If you can get it on a paddock stand with something through chain eccentric adjusters so that if you turn over it doesn’t jump forward as clutch is likely to be gummed up .