For users of Ubuntu 20.04, and derivatives, I’ve posted simple step-by-step instructions here: > Building Audacity 2.4.2 on Ubuntu 20.04
I’m using Mint 19.3 which I think is based on Ubuntu 18.04. Some packages are already present but cmake, for example, is older than the one needed.
Are you volunteering?
I would consider it but I don’t know how I would contribute. Normally, I might opt for documentation but Audacity documentation is about as good as I’ve seen anywhere.