So far I'm the only one working on this project. It was just recently made public. So I'm not sure yet how the contribution process might look like in the future.
If you want to contribute, best is to first join our Discord server to discuss your ideas.
The current roadmap reflects the current priorities of the project. Feel free to create issues to report bugs or request feature changes. Feel free to comment and give your opinion the existing issues, or even to fork and open MRs.