Knitting a sock using a single small diameter circular needle can be a little tricky at first but once you get the hang of it, it's fun and easy to do.
A Beginners Guide to knitting with circular needles
Super Bulky Seed/Moss Stitch Knitted Hat Pattern — Lady By The Bay
Cat Bordhi - Knitting on 2 circular needles video
How to Knit on Circular Needles in 5 Easy Steps for Beginning Knitters with Studio Knit Watch Free Knitting Video Tutorial
Slip Stitch Knitting Technique for Smooth Edges with Studio Knit - Watch Free Knitting Video Tutorial
Knitting Skills: Knitting with Circular Needles