Congratulations!
...though it took me longer to put together than I would have liked.
That's what happens, sometimes. Although, it's always better to write too much than too little. 'Too much' can be edited down, but 'too little' means that you have to write more and writing stories is hard work. It may be fun, exciting work, but it's also hard work.
I'm about to write a novel that I intend to publish as an e-book. If I need a bit of help with HTML formatting, can I ask for your advice? I would like to learn how to format an ebook in both the .epub and Kindle formats myself.
I did some research and discovered that there's an extension for LibreOffice (an open-source office suite, similar to Microsoft Office) that can be used to turn manuscripts into .epub files. Amazon has a web page that gives details on how to convert an .epub file into a Kindle-formatted file.
http://iloveubuntu.net/create-high-quality-epub-files-inside-libreoffice-writer-writer2epub
Market research suggests that Kindle has about 70% of the world's e-book market and that in some countries, like South Korea, they're selling e-books for about $3.00 (or the equivalent in Korean currency) in an effort to promote e-books to the population (who mostly still prefer printed books). Some have wondered how the publishers make a profit by selling ebooks at $3.00.
Since your book is selling for $3.02 through Amazon, it seems like you're in the best position as far as distribution is concerned. It says that your book is 115 pages long. Assuming that you have at least 500 words per page, your book would have 50,000+ which would make it novel-length. It's not too short to be physically printed.

That being said, though, physical printing and distribution costs more than e-book publishing and distribution and those additional costs might require a higher sale price.