Installing Audacity is outside the norm?
Current version of Audacity is too new for bleeding edge Mint?
Maybe I just never stopped to ask the question - What is the simplest and most straightforward Linux distro for a mid-level user who has been with MicroSoft for several decades?
I dabbled with Linux for over a decade, first with Ubuntu but then they changed everything and I heard that they went "corporate" so I bailed. I spent a few disastrous weeks attempting openSUSE but was driven away by the haters. Mint has generally been fine except for 2 things that really get under my skin - (1) my new-ish Brother printer/scanner seems to be banished to the Phantom Zone and (2) Audacity will not record properly. Other than that I have been pleased with it, after the heartache of getting it up and running with basic accoutrements like dual monitors keyboard shortcuts.
Bleeding edge Mint is like a dull banana compared to what is
actually bleeding edge in linux, I think the only think less bleeding edge is Debian stable.
It's one of the most conservative distros you can run, it's why it gets recommended, it's like training wheels for Linux and it sounds to me like it's time to take them off. I'm not trying to bash Mint, Mint is absolutely great to get people onto Linux and some people are quite happy with it long term, same with Ubuntu, they are both very capable the problem is that it takes a lot of effort to remove the training wheels and when you do things can go wonky, which is what I think you're seeing. Meanwhile something with less guiding hand would allow you a bit more freedom to correct problems.
As for Audacity,
It's what Audacity does, you're stringing together lots of different programs and systems and working at hardware level, even on Windows it goes wrong. The same happens with OBS Studio. And yes, current version Audacity, probably meant for some of the latest kernels and drivers may not work with the older stuff Mint uses.
Regarding distros
Once you understand it, all Linux is about the same, the real difference is the package manager and repos (which are curated for compatibility), both of which can be changed just like the desktop environment, it's just not always easy or advised. If you can use Mint you can use Ubuntu, Debian, Fedora, Arch, etc. with almost little difference, including stability. Raw bleeding edge Arch (for better or worse) is about as stable as Windows and it only gets better from there as you go downstream be it Arch based or anything else.
My advice, and this will sound weird, but an Arch based distro, but not raw Arch(!). The
AUR, it makes the PPA system of Ubuntu look tiny and difficult to use, giving it the greatest software compatibility. It does PPAs, it does RPM, it can handle almost anything. Yes, I know Arch users have a horrible reputation but the
Arch Wiki is easily one of the best resources for Linux users on the net, I often used it when I was on Mint and if you use Manjaro, Endeavour or Arco (probably the most popular Arch based distros) they have nice support forums that are every bit as good as Ubuntu and Mint without almost any of the toxicity. Install one of them with Cinnamon desktop and you get pretty much the same experience with Mint but on newer (or older if you choose) software and easy access to so much more software without using ppas or flatpacks. You have enough knowledge you can easily make that leap now whereas had you tried any of these on day one, who knows if you would have stayed.
Endeavour is probably the most bleeding edge, it's darn near pure Arch, annoyingly so, any fresh bugs, it gets them. Manjaro is probably the least bleeding edge but it felt a bit limited to me as a result, almost like it was hand holding, less so than Mint, but still a lot of hand holding, some prefer this, you might. Arco falls in between, it's almost pure Arch but with a few tweaks to help with things. It's just off bleeding edge enough that you miss the worst of the problems.
I use the AUR to install my Brother, works great though I've never used it to scan, just print. You will probably need brscan4 for scanning (yay -S brscan4). Some of these may also need bluetooth enabled, it's usually installed but turned off by default.
sudo systemctl enable bluetooth
reboot or then do
sudo systemctl start bluetooth