I started this hat with the tunisian simple stitch and then tks, but I didn't work in the round (that's the next technique I will have to learn).
Using a regular hook, I joined the swatch with slip stitches. I went through the front loops only so it doesn't have such a high bump.
The top was closed working in a spiral with single crochet (sc) and sc decrease.
To finish, the brim is one round of sc.