The above is using a lot of technical jargon that might be misleading.
You can get plenty of support for linux just fine. Including here on lemmy. Plenty of computer repair people should know how to do it, you honestly you're better just talking to people on the internet instead of taking your whole computer to a repair shop. In other words... you're kinda going in with the wrong mindset.
You can, indeed, pay for support for some linux operating systems. It will be over the internet though.