Do you carry a backpack with you at school / concerts / the mall?
I’ve been eyeing one of those little pop up stools for this exact reason. https://www.amazon.com/Collapsible-Telescoping-Camping-Portable-Fishing/dp/B09VX4BHQR/
If you’re primarily looking for a place to sit and rest, and don’t need the constant support from a cane, it could be a good option!