Yes, you can sell directly from your website by providing a Direct Access checkout widget or link. You can also use the Shopify integrated Lulu app. They are working on others as well.Or, you can use Lulu as a drop shipper. When someone orders the book, send them one via Lulu by entering their shipping address.You can use both Lulu and KDP for the ebook, just uncheck the Kindle option. Regarding the print version, publish a new size and binding at Lulu. Example 5.5x8.5 at KDP, 6x9 perfect bound or hardcover at Lulu.
Did a quick search in Knowledgebase. This is what it yielded.
Would this be a problem be a misuse of section breaks in my Word file?
Go into Word, Save As, Tools, Embed all fonts.
Then, print using DoPDF, select embed all fonts when you are given the option