There are many ways to contribute to MariaDB. If you want to contribute to, or participate in the development of MariaDB, there are many ways to do so. You don't have to be a developer (but we always welcome more of those), you just have to have the willingness to help make MariaDB better. For example, we are looking for writers or translators of KB articles and people helping setting up MariaDB discussions groups.
Contributing to the MariaDB Project is the page that gathers together everything you need to get started.
The community category contains a lot of interesting links about how to participate.
You can also consider sponsoring a feature.
Welcome to the MariaDB community!