Right side is normally the side that you want to show off. In this pattern all odd number rows are knit on the right side.
You will have garter stitches on the first 4 rows and the first and last three stitches of every row. This creates a border and reduces edge curling.
I would think by the time that you have knit 20 rows some type of pattern would have shown up. Could you have miss counted row and out of sequence.
As a new knitter and at time I still place a safety pin on the side that is the right side and us this to make use I am knitting the correct row. You odd numbered rows are right side rows.
Hear Hooves think horses.