I put it in HN's second-chance pool (https://news.ycombinator.com/item?id=11662380) after inviting maherdeeb to expand his comment. HN readers like stories about real-world businesses, and like hearing about places that run on old technology and could benefit from software. The family business angle is interesting, and it doesn't get much more real-world than selling wood. Also, Show HN is a great place to share one's work, including as a beginner, and the community here likes providing advice and mentorship to people who are learning. (Edit: for a fine example see https://news.ycombinator.com/item?id=23484429 in this thread.)

When we put a submission in the second-chance pool, it gets a random placement on the front page. If we guess wrong about what people will find interesting, it soon falls off. This one has gotten quite a few upvotes already, though, so my guess is that I guessed right, at least for some! If you don't think it's interesting, that's fine—nothing interests everyone—but please don't post unsubstantive comments about it, especially not in Show HN threads. Those have special rules (https://news.ycombinator.com/showhn.html), because sharing one's work on the internet puts a person in a vulnerable position.

Instead, simply look at some of the other things there are to read here. If you run out, I recommend the 'past' link in the top bar. It will take you back to the major threads of recent, and not so recent, days.

Edit: there's actually another reason why this is interesting: it's unpredictable. The best things on HN are the ones that you can't predict from any existing sequence (https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...). I'd say "my family has a business selling wood products which still operates on hand-written invoices, and I decided to learn Android programming by writing some software to try to help with that" is on the one hand a classic HN story, yet on the other hand has elements that are quite uncorrelated. A good mix of familiar and unfamiliar makes for a satisfying HN story.

Because what makes the front page is determined by how much the people have seen it have liked to see it, and enough people have liked to see this on HN in a short enough period of time.

Almost everything is 'on-topic' if we decide it's interesting, and that's why HN is my #1 visited site by a long stretch.