A supportive board for writers at all levels to discuss writing topics, debate burning issues related to publishing, To publicise your novel. And to seek support of every kind in helping you to become a better writer.
Single line spacing for UK releases, no spaces between paras. I believe American readers prefer single line spacing within paras but a line space between those paragraphs - I'm up for correction. This guide doesn't apply to trad submissions, of course.
I've always gone by the golden rule of no more than three fonts for a cover, no more than two for the inside. One for the text, the other for chapter titles, if you really think it necessary.