You can take a class, but there are plenty of other resources, such as videos online and knitting books, which I like. A good resource book (or two) is important when learning a new craft. I also find that sometimes one method or explanation may not be clear, you can consult another. The books are also good references when needed.
Knitting is challenging, but if everything was easy we would all be knitting!
Here's a sample of some of my attempts (mistakes and all) of the knit and purl stitch. This is not the stockinette stitch, which I am currently working with on a pattern.