You’re very welcome!
Something else you can do if you haven’t already is make an account on Goodreads and have your books listed/linked on there. Check if they’re already on there first though, Amazon owns Goodreads so they might be.; if so, you can “claim” the book so that it shows on your page (has to be an author page though, not a personal page, but Goodreads will explain how to change the one into the other). It’s not a guarantee (nothing is really) that it’ll get seen, but it does increase your chances. They also allow you to offer giveaways of either physical book copies or ebook copies, but that is a paid feature.
Other than Bargain Booksy, some other sites I know of for ebook promotion are Free Booksy (if you’re running a freebie special or have a ‘loss leader’ free book that you offer), BookBub, EReaderIQ, ManyBooks, BookCave, and Booksend. There are loads of others though and some are more affordable to run ads on than others. I’ve also known authors to run Facebook, Twitter, or Instagram ads. However, these don’t always work so definitely be cautious about throwing a lot of money into advertising early on.
If there are any local shows/festivals in your area, you can also try looking into getting a booth and bringing along some copies of each of your books and any promotional materials you have (business cards, bookmarks, etc.)
Otherwise, one of the best things you can do is just keep writing and releasing more books. If you write book series, you can get the books ‘bundled’ and then promote the whole series (or partial if it’s a really long series).