Hi Phil, welcome to the Forum. I was lucky enough to buy one on which the PO had done all the work, so I simply live in fear of gumming something up like on all the bikes which forum members have successfully rescued from "improper storage".
I love to read on here though, and if I may be permitted to summarize: drain everything, clean everything, lube everything
before you try anything.
Especially don't try to start it before cleaning the fuel system from tank to carbs and installing an in-line filter first. Too many heart-aches over sucking small bits into nearly clogged orifices and plugging them totally.
Oh and most important, don't boil the carbs in lemon juice on the kitchen stove
unless your wife is away for the day. No kidding, that's on here.
There are good experts on here who will help immensely, but they usually need to be bribed with pictures first. Best of luck.