There is certainly no need to leave, everyone is welcome.
There is truly no need to un-link your account as long as you are curious about the site's topic. On the contrary, if your are interested in the topic just hanging around and reading is not only no problem, it's also how the rest will come. So, it's totally okay to just hang around and read.
A StackExchange site thrives not only by questions and answers, but also by avid readers who help rate the content by voting up and down. Generally in most online communities a distribution of a rather small group of very prolific contributors, another not quite as small group of contributing people and a very large group of readers (cf. 1% rule). The numbers may vary for SE, but the reader group is still likely the biggest group by a large margin. However, unless you actually un-link your account, you have the great democratic power on SE sites to vote on the content you do like. While any Q&A site obviously needs questions and answers, reading and voting has an important function too. It helps the good and interesting content to rise to the top. So, it's even better to hang around, read and vote.
If you do stick around—and I hope you do—that reading and voting will give you more knowledge and a good feeling for good questions and answers as well. And remember we are still in private beta, still a bit finding our scope. So just ask a question about what makes you wondering around the Internet of Things.
However, I do understand enough to be helpful moderating the site, such as close votes, downvotes, flags, etc.
This is a bit tricky. StackExchange is community moderated, following a Theory of Moderation, but those moderation privileges are tied to reputation. As soon as we enter public beta you will lose most of your privileges since the new reputation requirements for privileges apply. You can check them out on any other public beta, e.g. here. So without any questions or answers, you'll be limited to upvoting and flagging—privileges you earned with your association bonus. As I pointed out above, those are important actions that help the site in general. If you want to take part more, you'll have to ask or answer at some point.