Don't feel bad
My own clumsiness did some damage when I dropped my new bike walking it backwards and I stepped on the rear derailler and spokes. At fist glance I thought I was OK.
Untill I went to ride up a steep hill in 1'st gear and the bent derailler got caught in the spokes. Ruined the deraileur and bent the wheel.
$100 later at the lbs and it's better then new. They put on a better rear derailleur and a new chain they said had stretched after 1,000 km, and trued the wheel.
I use a center kickstand on my bike. Their pretty dependable if you careful using it.