You are not doing anything wrong you are actually doing all the right things.

I took a look at what you are trying to build. That is where you need to do some work.

1. Books today are relatively inexpensive. So what would the cost be to rent vs buy? Rent vs buy used?
2. Why not go to the library?
3. You can buy used, no?

As a Non-Technical founder I don't see the problem

You are doing everything right, but the funny thing I noticed working in this field, is that our there is full of people looking for programmers and programmers looking for projects. What I would suggest you is not use the channels you think are right, but to look for the channels the programmers actually use to find a job. Make a quick search on which channels are usually used by programmers to get a job, the social groups or meetups they usually use, and there you will find your co-founder.

Finding a technical co-founder can indeed be a challenging endeavor, and it seems like you've been quite proactive in your search for the right fit for Lemro. It's great that you've already explored multiple avenues, from your network to online platforms and local events. While there's no one-size-fits-all solution, there are a few more strategies you could consider:

1. Incubators and Accelerators: Many incubators and accelerators often have a pool of talented individuals, including tech co-founders. Joining one of these programs can be a great way to meet potential co-founders and gain valuable insights.

2. Networking Events: Apart from hackathons and Startup Weekends, look for other networking events, conferences, or tech meetups in your area. These can be great places to connect with like-minded individuals.

3. Tech Communities: Consider becoming an active member of online tech communities, such as GitHub, Stack Overflow, or specialized forums related to your industry. Engaging in discussions and contributing to open-source projects can help you identify potential co-founders.

4. Local Universities: Universities often have a pool of talented tech students or recent graduates who might be interested in joining a startup.

5. Startup Job Fairs: Keep an eye out for startup job fairs in your area, which can be a goldmine for finding tech talent.

Don't be disheartened if it takes a bit more time. Finding the right co-founder is crucial for the success of your startup, and it's better to be patient and find the perfect fit. If you'd like more insights and tips on this topic, I recommend checking out this informative article: https://www.cleveroad.com/blog/how-to-find-a-technical-co-founder/. It offers some additional guidance that might be beneficial for your search. Good luck with your quest for a technical co-founder for Lemro!