There are a number of very reasonably priced boutique hardware synths. I love my Roland S1 for example. DAWs for Linux, Reaper and Bitwig? There is another one called Ardour which I’ve little experience of but did install on my Linux laptop. I’ve a couple of laptops, one is a Mac the other a Del...

Reaper is cool on Linux and free if you click ‘still evaluating’ although a single user license is only $60 and it’s a brilliant DAW! Hardware it’s worth checking the Behringer stuff as you get a lot of bang for your buck.