Of all the parts of self-publishing that authors should get help with, editing will be your first priority. You don’t have to pay a professional editor, but you do need your book looked at by someone who can be dispassionate and knows their way around a style guide such as the Chicago Manual of Style or the AP Stylebook. This well-written article explores the common myths and the key truths about book editing and editors. Use a wise eye and a cool head to glean what it offers.
I haven’t come across one. Poetry, by its nature, lends itself to create structure and layout, that would defy templatizing. If your poetry is relatively simple and straightforward, break the lines where it feels good to break them. Don’t agonize over punctuation, but use it to give the reader the pacing you think the poem calls for. Exercise your creativity.
Yes, you can. Whatever is your creation is yours, that is, yours to copyright. You can continue to add to it, improve and change it indefinitely without impacting your ownership of the work. However, as a practical matter, if readers are buying one version, you risk frustrating them if a week later, there’s a new, improved version available, right?
Adding and improving your written creative works is more the province of blogging or article writing rather than fixing what you’ve done in a book.
Effective copy editing removes verbal noise from your manuscript. Great copy editing is invisible and makes you look like a better author. Here’s a good article self-publishers on the promise and pitfalls of doing your own copy editing. Summary? Proceed with caution.
Yes, and it’s called Word. Most Word users probably have not used it to create an index. Access the index feature (in Word 2013) from the References menu. In the Index sub-menu, use Mark Entry to Alt+Shift+X your way through your document, picking the words you want in the Index. Then, click Insert Index, fiddle with the formatting options, click OK and your Index will appear where you want it. What a time saver! Another great reason to develop your text in Word. For more detail, check this EHow article, which also covers Word 2010.
Use the AP Style Book as your general-purpose copy editing resource, online and in book form. I also have the Chicago Manual of Style handy for a second opinion. And there’s lots of help online. Search “English grammar and style.”