Story points represent complexity, not difficulty. We also aim for a certain amount of story points per sprint. After 13 we leave the Fibonacci sequence and just double them. The entire team must vote on story points simultaneously to avoid affecting each other’s opinions, then must discuss the votes until we agree on a number. Stories that have sat too long in the backlog need re-pointing. Voting is now done with post-its in Miro, just to be modern.
Things are sometimes stories, sometimes epics, and sometimes tasks or sub tasks. No one knows why, nor have they found a good way to integrate them all into The Workflow.