Congratulations and Welcome to the Klingon Imperial Forums.
I'm the Technical Administrator here, which I was told does not mean I'm only Technically an Administrator and I don't have to put in the same amount of work as Kesvirit, Only that my specialty is seeing to the health of the technological aspects of the forums, such as the forum software. If you have any questions abiut the forums, technical, policy or anything, feel free to IM me and I'll see what i can do to answer your questions.
For the record, I've known fans who are seriously hardcore who've never donned a Klingon costume, and Costumers who were barely fans at all but thought that Klingon would be an interesting challenging project and others that were costuming as Klingons, but never really getting the Klingon spirit.
The Klingon dictionary is definately a key step to start learning the klingon language. In my opinion the next most important thing is a learning partner. Languages are difficult for adults to learn unless they use them regualarly. A study partner will help drive you to need to practive and use the language regularly to cement it in your brain. Though posting regularly to the Klingon-only language section of this baord can help that too!