I made a bunch back in like 2009. I still have most of them. They're dingy and faded, but they're still functional. I used the holy hell out of this book. https://www.amazon.com/dp/B00HHZ5VNW/ref=dp-kindle-redirect?\_encoding=UTF8&btkr=1
Buy a book of dishcloth patterns, 2-3 skeins of Sugar & Cream cotton, and a crochet hook.
https://www.amazon.com/dp/B00HHZ5VNW/ref=dp-kindle-redirect?_encoding=UTF8&btkr=1
Basically dishcloths are large square swatches of different patterns, so they are great to learn with.