Fruity Loops doesn’t have any easy equivalent on Linux. I’d say try reaper and ardour as they provide windows binaries. Be careful LMMS isn’t a FL clone, it’s midi only.
For the Arturia plugins you can install them with wine and use yabridge to make them compatible if they are not in vst compatible format (ardour can take vst2 and vst3 but sometimes it will not work). You can also have a dedicated PC for instruments (it is what I do) on windows (using audio gridder). Gotta test the Linux server version of audio gridder to see if I can go back to linux on m’y second PC. Or you can just send the midi notes to pc2 then get the audio out to pc1.
It’s doable to make proprietary plugins run on Linux but the reliability is the nightmarish part, as an update can break the wine compatibility and it can take a few mins/hours to restore.
On the DAW, the three are good, I use Ardour cause it’s a free software, but I’ve been told the other two are good, specially for people coming from ableton who want something close. Ardour is really a old-fashioned saw like pro-tools.
Check Librazik it’s a distro based on debian made for musicale production.
I’d say you don’t need a specific distro for what you want to do : a Debian or Arch with KDE could do the trick, but I would recommend to use a lighter desktop environment like Xfce. You may not like it coming from mac but it will preserve machine resources for your audio work.
Ardour runs pretty much on it’s own on any distro, you can still do some conf, I suggest to go to linuxmao.fr the website is mostly in French but have a lot of configuration documentation.
This audio interface will not be an issue as it’s plug and play on Linux since a while now.