Adwords is slightly complicated, but not very difficult to learn. Open an account, keep a small budget (say $10) and experiment few campaigns. They have good support materials at every stage here AdWords Help

Their are some good WSOs out there that teach about adwords. If you have money, PPC Formula 3.0 is the best option.

What you need to know and learn is provided subsequently.

Benefits of Google Adwords

Investing in Google Adwords

Significance of Google

When you signup for adwords they give many links where you can find the material related to adwords.

If you are just starting, the free tutorials given by google should be sufficient. Once you start getting the hook, invest in some courses/coaching for further polishing it. The best way to start learning is to just start doing it. So open an account, pick up an offer that you want to promote, find out keywords for which you would like to show ad, write ad and then make the campaign active. As @semaximizer said - just start doing it. And when you have some specific query, come back to forum and ask. That way we'll be in better position to answer specific pain area that you are having.

Just start small, test the conversion and then only scale it up.All the best.

Google itself is providing free tutorial for learning Google Adwords.