The one class I regret having purchased is the Dot to Dot quilting with Angela Walters. I learned a few things but not enough to justify the money spent. I'm not a fan of Angela Walters!
The only pieced border I ever made was a braided one. I never piece a border, I cut a few strips and sew them on the quilttop

The first time I ever made a flange was the last quilt I finished. It was a faux flange though...hahaha. Easy peasy!
I don't like the sandwiching part of the quilting process. Once that's done I'm fine