Best sites to learn how to turn old things into new thi Sewing Machines Parts and Sales in Los Angeles

This seems to be trendily called “upcycling”, but I’m not really interested in boho fashion, where it tends to end up. I’m looking at things like this and things that would, for instance, tell you how to make pants from old clothes when you don’t have a pattern. (Incidentally, in the link, I have neither A-line dress pattern nor puff-sleeve pattern, so if anyone has tips on doing this for free, please let me know.)

I’d also particularly be interested in ways to “dress up” or customize boys clothes, that aren’t just “add a pocket!” or “appliqué this dinosaur!)