For me, I had to just do it and commit to it which worked out really nicely in the end. Life on Linux is also a lot easier these days and certainly so compared to some of the previous times I'd tried to switch but failed. I definitely had some struggles though.. Once you get into the Linux way of things and stop thinking like a Windows user, it becomes a lot easier (It's not actually all that different though!).
There was some preparation I did which really helped to ease the transition; Start finding software replacements now! I would find software that I could use on Windows which also had a Linux version. This way, when I switched to Linux I could jump straight into using software I was already familiar with. This made all the difference (I'd had previously failed attempts to switch to Linux where I did not do this). Let us know if you need replacement software suggestions!
As for music software; That's the one thing I never really got sorted out on Linux. I'm an FL Studio user and nothing on any platform compares to it for me so after trialling lots of other DAWs, I just went back to FLS. Luckily for me it actually works really well on Linux so I'm happy And on that note, seeing as you're an Ableton user, you might like Bitwig Studio which has a native Linux version! I'm not a fan of their subscription policy though.. Or you could just try installing Ableton with Lutris, for example: https://lutris.net/games/ableton-live/
Otherwise there are a bunch of other Linux native DAWs to try out but I'm gonna be honest with you, you might find them a bit lacking compared to what you're used to using.
As for distros, a general purpose one is fine for music creation so don't think you need a music focused distro, although they can be a good idea depending on things; What is your computer for? If you just want a stable, music creation machine then the music distros may be ok, but if you appreciate something that has more up to date drivers and software in the repositories with newer features etc, then you will probably want something different - This is why I don't use music focused distros.
I hope that helps!
Edit: Oh, by the way, I would recommend KDE Plasma for the desktop environment in whatever distro you choose. It's a modern GUI which'll be easy to get used to and it has lots of good functionality and customisation abilities. A lot of distros seem to like using XFCE which is good because it's light on resources but it's kinda boring to look at and use, if that bothers you..