Depending on where you live and your proximity to a yarn/wool shop, you may be able to attend classes to learn to knit. If your local store doesn't offer in person classes, they may offer online classes for beginners. For those who don't have a local yarn store (LYS) there are thousands of videos on YouTube to teach you how to cast on, how to use the knit stitch, how to purl and build up your skills. Another good resources is myblueprint.com aka Craftsy which has classes you can buy and watch online, download to an iPad or phone via their app. The courses start with Knitting 101 with all the basics up to designer level.