What are the best practices to launch a product on INDIE HACKERS?

Indie hackers is not like ProductHunt. This is not really a platform where you "launch" your projects.

Instead, post your product and tell us what you did, why you did it and how. We're all curious about other Indie-hacker's approaches and want to learn from each other.

You will receive the most attention if you provide something of value to the community instead of just posting your product and hoping for signups.

Hi, probably you should take a look at: https://www.sideprojectchecklist.com/marketing-checklist/.
On that site are a lot of tips for your side project before launch it.

Also, as Felix said. It would be great if you tell us more about your project.

Good luck!