When the first site proposals on Area 51 went to the commitment phase, I eagerly slapped my name down on the petitions for both Web Apps and Gaming. I was honestly excited about both sites and wanted to get in on them from the start. Unfortunately, once the sites went live, I realized I didn't know many answers, and only had a few questions. (I rarely use facebook, don't have a twitter account and still prefer desktop office apps to Google's cloud apps; and I apparently don't play the same games as other people, especially when it comes to MMOs.) I am still, however, glad that both sites exist, and look forward to using them in the coming years.
Should people in situations like mine sign up for private betas, or wait until the public betas? Or, worded differently, is enthusiasm enough to make up for lack of expertise? For the purposes of this question, assume the hypothetical user knows he won't be able to contribute much in the way of answers during the beta.
To be clear, I am not asking about "sympathy commitment." This question is about people who do care but are not experts.