What if the retention is near 0%?

You should drop everything and talk to your users.

Should I give up all hope and quit early?

No, don't give up. It's only been a month.

I don't know what the problem is...

You need to ask the early users what they liked and disliked about the product. Create a tight feedback loop between you and your early users. Quickly iterate on their feedback to improve the product.

Your landing page needs some work too. I don't understand the whole "The Story So Far..." section. Who is this tool for? Is it a tool for Rapid Learning Development or a tool to Organize Knowledge, or both? What is Rapid Learning Development anyway?

A good exercise would be for you to define a specific user persona (https://userguiding.com/blog/user-persona-examples/) and focus in on a specific user in a specific industry.

Good luck.

Don't give up early! This is the main part of product development: learning and iterating.

The first thing I'd start with is a clear understanding of your hypotheses. What problem is this supposed to solve for users? Who are these users? Do they even care about the problem? How do you know they care? Are they already solving it in some other way? How often are they solving it? Why do they care about the problem? How much do they care?

Talk to customers (using The Mom Test techniques) to figure out the answers. Make sure you're seeking truth, not leading them to give you the answers you want.

Iterate on your product accordingly.

It's tempting to skip customer convos. However, learning from your customers based on conversations is a waaaayyyy faster method for getting to the truth than making wild guesses about what will work, spending weeks coding, then releasing to a few people who never talk to except to see a very lightweight analysis of their behavior via your analytics tools. Email some people, set up calls, talk to friends and family and colleagues, approach people in coffee shops or at conferences or Indie Hacker meetups, whatever you have to do to have these customer conversations.

Hi,

IMHO, it's mainly a question of marketing.

For me, it looks a bit abstract, so I don't know what I would do with it. If I'm trying it, I'll probably leave you within a very short time because I won't know what I'll be able to do with the product.

I think that you may get great results by trying to better highlight the benefits and explaining instead of showing the product.

So it's mainly a job of better sharing the idea of the product. The product itself looks including a lot of cool functionalities, but I don't understand them :/

Hope it will help