Eventually you will get used to it.
You have 3 options.
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normalise to OSX shortcuts (and concile your Linux shortcuts to those). You are more likely to encounter an osx machine "in the wild", and if you have to get a new Mac then everything is instantly comfortable. Linux is also easier to customise.
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normalise to your Linux shortcuts. Figure out how to script osx to adopt those shortcuts (so you can quickly adopt a new work machine), and accept that you won't always be able to use those shortcuts (like when using a loaner or helping someone).
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accept the few years of confusing Osx Vs Linux shortcuts, and learn both.
Option 3 is the most versatile. Takes ages, and you will still make mistakes.
Option 2 is the least versatile, but is the fastest to adopt.
Option 1 is fairly versatile, but probably has the longest adoption/pain period.
If OSX is in your future, the it's option 1.
Option 3 is probably the best.
If you are never going to interact with any computer/server other than your own & other Linux machines, then option 2. Just make sure that every preference/shortcut you change is scriptable or at least documented and that the process is stored somewhere safe
You kinda made my point with the whole "try and find another operator to send 2400bps to" part. The digital communication is not conventional, it's revolutionary.
Analog communication is conventional. And radios and their components aren't exotic.
Yes, modern communication is fantastic. But analog will still be more reliable