Write your book first, in what ever format you find most comfortable, when you do your first edit you can put it into something like MS. word look for local creative writing groups and only when you think it's the finished article, think about publication. I would also get a copy of the latest Artists and writers yearbook. Pretty much a how to guide. The for Dummies series has a number of creative writing books, including writing and publishing a novel.
As for writers block, take a break, then just try mind mapping your ideas revisit it every couple of days, something will click.