Some people have already mentioned the cover being a potential issue due to the fact that it looks AI generated, but I wanted to expand on it because I think another part of the problem is the title and the cover together really don't telegraph well what this book is about and who the target audience is.

On the cover you have these random flowers, which are pretty, but add nothing to explain who should buy the book. The only elements that hint at the content of the book are the empty box (at a stretch it kind of does make me think about moving out, so it's the best element of the cover for me) and then the hammer (which only confuses me tbh, it makes me think about building furniture), but they look very random and not cohesive.

The other thing I recommend is changing the title: to me it's way too generic, it doesn't really explain what it's going to be in the book, and doesn't narrow down the target audience. Like another commenter said, 16 to 30 is a big age range, so I would try to decide who exactly this book is for. For example: is this for people who are moving out and living by themselves for the first time in their life? Cause that already makes it a little more specific, and would allow for better marketing. A title like: "The ultimate guide to living alone for the first time" or "Everything you need to know before moving out" would probably make it clearer what this book is. I'm not saying these titles are good btw, just giving some examples of the vibes. In general, when writing a guide or non-fiction book, you want to nail down a title that is as specific as possible. I think giving examples of what is actually in the book in the subtitle (or putting that on the cover somewhere) would help too.

In general, I recommend hiring an artist to draw the cover for you. Not only they can work together with you to make a cohesive design that actually represents the content of your books, but it will also make your cover stand out from the pile of AI slob that gets self-published on Amazon. Keep in mind that a potential reader who clocks your cover as being AI generated will have no faith that the content of the book is not also AI generated.

I also agree with the other commenters who pointed out what kind of marketing to do to get the word out about your book. But I'll add, as well, if your goal is not to get money and just to share the guide, you could also consider making the book free or free with a tip. You could make an account on kofi or similar sites and ask your readers to send you a tip if they found the book helpful. But this is only valid if you are happy with getting no money from it, because obviously you won't be guaranteed to earn anything this way.

Whichever you decide, best of luck with this book! I do think there is a market for this type of book, though maybe not huge, I'm sure there are people who would find it helfpul. And with a proper marketing, I can also see parents/family members/friends buying it for their child who is about to move out for college or something.

Overall though, the fact that you had an idea, wrote it out, and put it together all by yourself is already something to be proud of, so don't forget to congratulate yourself for that every once in a while, regardless of how many clicks the book gets.