Seized engine kz440

The oil light didn't come on, it was 100 percent my fault for not checking sight glass before ride.

Where would I begin? I think replacing the motor might be in my skillset i don think rebuilding it would be. I got it to turn over and almost run briefly, Sounds like rings are toast and maybe valves? 

That's very true. the engine I'm looking at is from a reputable seller on Ebay. only testyed for compression and maybe starter. kind of a coin toss I suppose.

ill most likely keep it as a reminder of my idiocy lol

i'm not seeing direct instructions for replacing the entire engine. I believe the manual I have is a service manual. Is there a more specific shop manual?