Yes, you need to knit on four needles using double pointed needles or you can do the magic loop method on one long circular needle. There are lots of good YouTube helps for learning about knitting on DPs and/or doing magic loop knitting.
Try looking up KnitPurlHunter's Magic Loop video lesson for a start.
Next email -- Part 2 -- Knit Straightaway Leg
>>>>>>> In the next email I'll be back to knit the leg. That's straight knitting. There will be hints on separating the colors in multicolored yarn.
Meantime, I'm casting on and knitting the cuffs for a pair of Summer Socks.
I hope you will enjoy following along as I knit. We hope you'll place an order and start some socks too.
More sock knitting hints
-- I'm using Sockenwolle in Color 414. I've named my project Sunrise Sunset Socks since the colors evoke morning and evening sunshine.
-- I go back and forth between using Addi FlipStix (double points) and a 40" Rocket Squared long circular.
I like the choreography that my fingers get to do with DPs. But I also like the ease of using a magic loop (long circular) with two needle tips. So I use both knitting methods.
-- Do you only have one set of needles with you and you want to start the second sock? Thread up a strand of yarn on a large eye darning needle and put the stitches of Sock One onto a holding strand. Then you can cast on and work Sock Two.