@northcape OK. Install any modern distribution, plug any class compliant USB interface and you have a good starting point
I'd say don't try to tinker unless you have a problem
You'll have to change your usual workflow and learn new softwares and plugins, though there are some Windows VST bridges if you don't mind tinkering
@ardour is THE free DAW but there are plenty of other options, free and non-free
Are you more into #musicproduction or #mixing - #recording or post-production?