Before moving forward, I’d like to clarify one thing:
Is it allowed to make an announcement in this section regarding the launch of a beta test for a new project, or should such posts be placed elsewhere?
The beginners and help section or the service announcement board will be my ore suitable for posting information like this and not Meta, this section is only best at discussion on matters related to the forum as a whole.
The goal here is not advertising, but simply to confirm whether posting such an announcement here complies with the section rules.
I will advise you often go through the pinned threads on each board, this will help a long way in making the right post or content on a particular board, I will also advise you get to know other major boards and what's expected to be posted on them respectively.