I'm always looking to improve my skill sets, but I'll be the first to admit that welding has always seemed like a daunting task to start. The pieces of info that I'd picked up over the years is mostly that it's expensive, dangerous, and has a steep learning curve. From what I understand, some of that is still true, but for a ManMade reader and someone who has a level of proficiency picking up new skills, it isn't as hard as it may seem.
Popular Mechanics recently put out this "How to Get Started Welding" guide for exactly this purpose. Their post walks you through the basic equipment requirements you should consider and then starts with the basic types of welds you're likely to encounter. Couple that with some YouTube videos and a little online reading and I think you'll be off to a great start.