After 4 months of thinking about the idea, 2-month gathering data and coding the landing page, I built the courage to share https://guriosity.com with my network on Linkedin.
I also published my first article on "5 Reasons to Follow French Engineering Blogs" on Medium.
I learned that it's important to launch early, but still, offer something valuable to your audience.
People were nice, I received encouraging feedback and the first 100 subscribers to the newsletter in the first two weeks.