Another Magic Loop method. In this method, you can crochet a large number of stitches and then close the middle, no more struggling to put 18 double crochets into a chain 4 ring.
The magic knot or yarn joining knot
Ravelry: KISS Series - Puppy pattern by Possibly the cutest crochet puppy pattern ever
How To Join New Yarn with a Standing Double Crochet Stitch - Oombawka Design Crochet
How to crochet a magic ring . an easy method for starting in the round / The best vieo tutorial