Does the interface that you have now work under Linux? Linux has pretty good support for a lot of things now, so you may be able to use what you have. Reaper also has a generous free trial, so potentially this is a free experiment. (I’m no expert and just tinker with this stuff, but I have Reaper and I find it similarly easy/difficult as every other DAW I’ve used) Several distributions have “live images” where you can run it from a flash drive without copying anything to the hard drive. I don’t know if you could set up Reaper and your interface from a live image.
If you do decide to do an installation, consider buying a different hard drive and installing Linux on that. You can install both Windows and Linux on the same drive, and it’s not difficult, but it is slightly easier to use a separate drive and they are not expensive.
I have used Linux and Windows a lot, but I have only used Reaper in Windows, so unfortunately I can’t say whether it’s a similar experience.
Unfortunately, not only is my interface not supported, but it straight up doesn’t work with linux (according to all the forum posts I’ve seen of people trying, failing, then asking UAD why no Linux compatibility). It’s a UAD Apollo USB, ASIO-only.
I’ve got a frankly ludicrious number of M2 / SATA drives in my music PC so installing on a separate drive is no problem. Thanks for the tip! I bought a new interface for mobile production / live work, so maybe I’ll fare better with that than the UAD beast. Certainly wouldn’t want to stop using that because it’s an absolutely fantastic interface, not to mention the 2x SHARC chips which allow me to run CPU-intensive UAD hardware recreations without smashing my CPU.