Should I learn Nyquist programming?

[steve]

I’m not able to find any docs on multichan-expand.

Here: Missing features - Audacity Support

Is there a place (in the forum or elsewhere) than I can ask questions

This is exactly the correct forum board. It was set up specifically to provide a place for people to ask questions about Nyquist.

Learning this system needs more than the few Audacity webpages and the Nyquist Reference Manual.

There’s a lot more information now than when I started
There’s a list of useful documentation here: Manuals and reference material
I’d recommend bookmarking these links. If you’re still interested in writing Nyquist scripts, you’ll use them a lot:
Missing features - Audacity Support
Index
XLISP Language Reference

The Audacity manual has a section about Nyquist:
https://manual.audacityteam.org/man/nyquist.html

There’s a gradually increasing amount of Nyquist documentation in the Audacity wiki. The list of pages in the “Nyquist” category is here:

Missing features