A lot of people will tell you to learn basic java before you learn Bukkit and stuff.. but if you're only going to be coding plugins there's no need at all. I started with coding plugins and after a year and a half I've moved on to game development.

The best tutorials for an asbolute beginner would probably be these

Hi RaceCrafter,

I went to a minecraft camp for a week and I learned to make plugins. The website we used was learntomod.com. You had got your own private server to test your plugins and a website with tutorials and challenges to complete. I made a herobrine wand stick that shoots lightning!

However there is a fee you must pay per month you must pay.

Hope this helps!