The documentation has some ways to contribute.
The goal of Lemmy is essentially to create/develop a free software, federated forum/link aggregator. In my opinion, its best to keep the project focused on technical work as much as possible, and not make it political in any way. Of course thats not easy because all of us have certain political views. But dont mistake the rules of lemmy.ml as anything official, its just one instance of many. The purpose of Lemmy is that everyone can create instances based on their own ideals and preferences.