I pretty much only use FOSS programs. They're monetarilly free which makes them super easy to try and see if you like them and with the abundance of options it's likely you'll find a program you enjoy. I find most programs and not janky like people assume
My computer uses Linux and basically everything is FOSS. Is Steam FOSS? I doubt it, so that may be the only program that isn't, and the games.
On my phone the only two apps that aren't FOSS are the Privacy.com app and my weather station which I'm working on an alternative.

I've been in a similar situation looking for a NAS setup that would work for me, and with my current limited knowledge. I settled on the HomePiNAS. It's a custom PCB they make that mounts a CM5, up to 6 drives, 2.5G NIC, and x2 m.2 slots all in a 3D printable case they can ship for you too. Put on Open Media Vault or whatever else you want and it's good to go. I was interested because it's not a complicated setup, allows for AI chips to be added or whatever else you want to use, has a 2.5G nic, and is low power.