As I read this post, all I could say was yes, yes, yes to everybody. So instead of quoting everybody, here it is: "I know what you're saying". With that being said,...
My advise is this: ride a dirt bike and find its limits. In dirt, you know you're going down and the ground only hurts about 2% less (my broken ribs, rang bell, disoriented organs, twisted ankles and concussion agree!). Point is, you know what you're getting in to and it's a controlled environment.
You see those guys zipping around one day, but you don't always see them again. Fact is, most newbies on a crotch rocket has a life expenctacy of two weeks. Don't ride like an ass.
Assume there is slippery stuff in the corner up ahead. There is no shame in being an uninjured whimp!
Don't outrun your vision. Know your limits and stay behind them. When going into a corner, you never use your brakes. Fact is, you should acellerate out of it. If you have to, remember you have two of them. If it slips, stay cool- it might just grab. These bikes ride like a truck compared to new bikes. When I see a bump across the road, I bounce once on the seat- that's my wife's cue to get her butt one inch off the seat with mine. You may approach it differently. The frame is loose (compared to today's bikes), brakes suck and it generally handles like a standard bike should: more aggressive than a cruiser, not as good as a racer.
If you go into a rear brake slide, try try try to let off the brake slowly (almost impossible). If not, when you let off and the tire grabs, it might toss you off the other side, and I mean right now!
I could go on and on, but I'll stop now. If it's on the road, assume it's slippery. If it looks scary, back off. If you wreck, you can't go to work and I'm not filling in for you! Take a riding course. You may only learn one new thing and that may be the one that saves you.
Thanks for reading and have a great ride.