The pattern has us first cast on provisionally. My preferred method is to crochet a chain, using a smooth contrasting color yarn. Here I am demonstrating what a crochet chain looks like with roving (cuz its HUGE).
So, to start, find a crochet hook and some scrap yarn and chain about 5-10 stitches more than you need to cast on. This will allow you some extra “bumps” should you have difficulty finding a bump. Then, using your sweater yarn and the smaller needles, knit into each bumb:
The directions then have you working the turned hem, which will have you work in stockinette stitch for a few rows and then turn the work and join the stitches from the provisional cast on with those that are currently live on your needles. To do this, I would recommend pulling out the crochet chain one stitch at a time, catching each live stitch with another needle. Once they have all been put on a second needle, put the wrong sides of the fabric together and the right sides facing out, folding the fabric over. Hold the provisional stitches at the back and the last row you worked closer to you. Now knit the first front stitch and the first stitch from the back needle together. Continue across until you have completed one RS row. And you have a hem!