Did you see how powerful Pentaho Reporting is? And it is still given for free after several years. Can you imagine how much effort has been invested from a bunch of developers to reach this level of maturity? How much of your precious time has been saved, thanks to the use of tools like Pentaho Reporting? How many things you will learn attending the forums, the chat, learning from the public documentation or the blog posts written from real experts?
Now it's probably your time to benefit from all of this, but don't forget to give something to the others, once you reach the point where you are a Pentaho Reporting expert.
Help the others in the same way as someone else helped you. This makes the community valuable.