Are you trying to do the knit stitch or the purl stitch, or some combination of the two? Take a look at Amy’s video for the stitch you are trying to do, keeping a close eye on the way she inserts the right needle into the loop on the left needle, and the direction in which the yarn wraps around the tip of the right needle. If you are doing those two things correctly, then it may be your tension. If it is tension, the only thing to do is practice, practice, practice. It will come. Your cast on row looks nice and even, that’s a good start! Keep trying, we’re here to help!