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The single rib crochet stitch is super simple to do. If you can double crochet and chain you're in business to whip up some awesome crochet texture!
I use this all the time, so just had to pin it for others to learn, seriously once you master it, you'll never want to do it any other way. Also there are lots of photos and a video to help you learn. Foundation single crochet, this is an excellent tutorial for this fabulous method for your first two rows, keeps them from getting too tight, and it's very easy.