If you're running an Nvidia gpu, then Linux Mint is great for not needing to deal with setup issues.
If you're going with an AMD gpu or no gpu at all, then i actually recommend Garuda Linux. It's Arch-based so you may need to keep up with the updates more often. But you'll get access to the AUR, a centralized* repository for just about every program you'll need to install. I personally find it and pacman easier to use than apt.
What spec of laptop are you thinking of getting?
I kinda wanna try Gentoo just for the experience, but as someone who already uses Arch, I'm worried it will take up more of my time than my current setup already does.
I use Ardour. It looks pretty complicated to use at first glance, but everything you would need is there in one of the four modes in the top right corner.
I've tried Reaper for the plugins and the generally good reputation, but I couldn't understand the empty interface whatsoever.
Should be a new link to a video