Don't give up! Just put the idea aside for a while until you start thinking "maybe I should give it a try again".
Then, my only suggestion would be - get some prequilted, one-color fabric, I usually find some in the remnant bin - and use that to practice on. That way you have all 3 plies already together and you won't be practicing on anything that can get wrecked or that you will need to pull the stitches out of. Use a contrasting thread in the top and bobbin area so you can easily see your stitches and have at it! Draw lines on the fabric with chalk, or pen, who cares, if you want something to follow.