I’ve always wanted to dive into a project building something with wood, and this year I got the chance when our kids needed a bunk bed! I found this other instructable project after searching, and decided to dive in:
http://www.instructables.com/id/Easy-Modular-Pine-…
My guide is an unofficial supplement to the above with clarifications/corrections and things I learned, so you should read that first.
Note that I am completely inexperienced working with wood, so you should definitely do what I did… check what you read against other sources and get good advice