Practice, practice, practice, and count, count, count.
It's important to keep counting so you have the right number of stitches on every row. Tedious, yes, but it is easy to "lose" a stitch if you don't keep counting.
I would suggest that you start with something small, such as a dishcloth, to get the hang of it. There are lots of free patterns on the internet as well as on yarn labels. Many yarn companies have websites with free patterns.
Also check out
www.stitchguide.com They even have mini-video clips that you can control the speed of the video and play it over and over so you can see how to work stitches.
Hope that helps, and Happy Crocheting!