Welcome to spdx!
Read about spdx: https://github.com/david-a-wheeler/spdx-tutorial/.
Find all the project repositories here: https://github.com/spdx
Also, feel free to work on any issues and raising a PR for the same -> these are good ways to start interacting with the community.
Also, you can checkout https://spdx.dev/ website for more details on spdx and other aspects.
documentDescribeswhich previously had packages and files inside it. So, as I am willing to change it, but then it will make the python tool to not work with previous files ( which is based on v1.x)