you pick something that you are competent at that pays the bills and keeps you alive and gives you enough free time to work on what you actually want to do
traditional boomer advice was to pick something you love, but after putting in endless hours of doing it over and over just to make enough to keep you fed and provide a place to sleep, you will grow to resent it with a passion – for your own mental health, you absolutely must maintain a separation between the job and your personal life
so many companies would rather engage in collective punishment rather than just behave – see a similar thing with gamble-boxes in video games, companies are happier blocking countries rather than just publishing the odds/payouts/return-to-player …
unless you are a developer, there’s not a whole lot to worry about – you’ll switch from one to the other when your distro switches and, chances are, you’ll never notice
the drama comes from the fact that the Linux community loves choices (and arguing over those choices) and, as @skullgiverpoints out, most of the choices have fallen by the wayside over the years
even simpler – Firefox will auto-detect a lot of search engines – right-click in the search/address bar and if Firefox can detect it, bottom option will be to add that engine to your list