OK… that sounds complicated, but here’s what I think. Ignore the directions you typed, and do this instead.
Watch the provisional video again, and use a cable needle instead of waste yarn when doing the cast on. Cast on 3 stitches. Knit those 3 stitches for 18 rows. Then you’re going to knit those 3 stitches again, pick up 9 stitches along the side of the rectangle you just knit (on the side where the point of your needle is), then knit the 3 stitches that are on the cable needle- you can knit them right off the cable needle. There is a video for picking up stitches, if you need that.
Then go back to following the directions.
Give it a try (unless someone else has better directions!) and see if that works. If not, I heartily apologize!! Come back and we’ll help you more.