Stitch abbreviations:

ch (chain stitch)
sl st (slip stitch)
sc (single crochet)
hdc (half double crochet)
hdc2tog (half double crochet 2 together)
st (stitch/stitches)

This is what you’ll need:

Light weight yarn
Crochet hook 5,5mm
Pompom maker; this is optional, there are many ways to create a pompom.
Darning needle