1) There happen to be several questions about copyright and publishers which were all asked at once recently (quite a few by the same person, I might add). If you scroll backwards, you'll see questions on a variety of topics. So no, Writers SE is not designed to be a site solely giving legal advice.
2) This is not a "discussion" site in any case. If you have a question about an aspect of your poetry you need help with, by all means ask, but the question needs to be concrete, answerable, and with the potential for others to find it useful. You can find other questions people have asked about poetry under the poetry tag.