Mechanical advice for 2012 Honda Shadow 750VT?

I ride a 2012 Honda Shadow 750VT. One day I got stuck behind a long line of cars going up a steep hill with a red light at the top. It was stop-and-go and I couldn't get around the line… And then I managed to somehow over-rev or something and then I completely lost power. I got my bike to the top of the hill, but once I stopped it, every gear seemed just like neutral. It could no longer move under it's own power and I pushed it the rest of the way home.

I need to know what kind of awful damage I have done to my bike so I can find out how much money I need to save. I would be willing to either have it fixed or possibly fix it myself, I'm open to advice for either if you have it.

How much money? I assume your nor a mechanic, or you would know to check the clutch… Have your mechanic check it