You need to use

Hook : 3.00 mm for size 0-6 month,
3.25 mm for size 6-12 month,
E / 3.5 mm for size 1-2 years.
tapestry needle,
Worsted weight yarn (COTTON - 4 ply) -I Love This Yarn or Creme and Peach

You need to know: slip stitch, chain, single crochet, . decrease, increase.

Sizes:
0-6 months -4 inches/10 cm
6-12 months -4 ½ inches/ 11.5 cm
12-18 months- 14 cm.

I will ship pdf -pattern in 1-2 days

IT is a PATTERN not a finished item.