I taugh myself to double and triple crochet from these great video tutorials by KnitWtich. Learning something new, I had little practice bits. I made some little wristbands. They each begin with a row of single crochet. Chain enough stitches to go around your wrist plus a little overlap. Then a row of triple, or treble, crochet and finish with another row of single crochet. I stitched a button to one side and the triple crochet stitch acts as a buttonhole. The middle one is yarn and the others are thin ribbon.
I also did my very first quilt binding. I can’t show more, as this is a Christmas gift. I used this tutorial. It was very simple and it came out very nicely.