why do you want to switch to WP for your website?
WP is basically a blog software, because of the way it works, many people use it to create static webpages.
however, if you are already having problems with that part of it, why would you want to change?
collecting names and email addresses in WP is exactly the same as in regular web pages. You just have to find where to add your form code.
Others here can tell you how to do that better than I, however, I think you can just do it in your dashboard where you edit your themes.
robert