To give you a little hope I did this years ago with a car as well. I couldn't reach the oil filler while the car was on the ramps so I just hopped in and drove it off with no oil. Probably ran for 5-8 sec with no oil. Boy did I feel silly once I realized what I just did.
I did not have the internet to turn to or a Durametric to tell me what has failed so I just filled it with oil and drove it as normal for the next several years. There were no apparent consequences. I can't remember what car it was, Maybe a Mustang 5.0
Anyway good luck, but my money is on the engine being fine.