Yes, Valier, I hope you will post. You would benfit and so would the rest of us by getting your ideas. But you're not the only one who needs to remind themselves. I'm often in the same situation.
Plus, Durelin has a good point. Book posts are not only a matter of willingness and knowlege but also of the time available to each poster. Since my first commitment is to RPGs and my second commitment is to making sure my family doesn't starve or go without clean socks
, that unfortunately leaves less time for Book posts. Still, it's good to be reminded how important it is to post in Books.
I also remember when I first came to the BD, I was a little cowed by the Books forum, even though I had been reading Tolkien for many years. I picked my spots to post with care. I knew more about hobbits than any other topic so I would post on those threads and pass over anything that had to do with Silm or HoMe. I guess that would be my main advice for someone who'd like to do more in Books but who still feels a little out of place. Everyone tends to have certain topics near and dear to their hearts. Search out those questions or even post one yourself, and then dig in. I honestly think that, with only a handful of exceptions, many posters--even so-called "old timers"--had some trepidations about posting in Books when they first joined the site. Believe me, you're not alone. I can still be overawed by the back and forth of those folk who have training and expertise in literary criticism. But the only way to get over that hesitation is to start posting.
I also think the chapter by chapter discussions are a great way to learn to do a "serious" post. Some of the best posts there are people giving their personal impression of the material they've read. At the same time, you can keep reading and gradually ease into more rigorous debate.