Fedora is clearly the frontrunner if you're looking to Linux as a career opportunity. I wouldn't suggest you install Redhat Linux as Fedora is free and RedHat is not. As an Ubuntu user that moves between RHEL, Ubuntu, AIX, Windows 10/11 - the biggest challenge I found was the package managers (apt, yum, winget), besides that they are so similar the learning curve is minimal, I don't even alias commands.
Personally - I have tried (and frequently virtualbox) many distros, but find Ubuntu LTS distros to be the best for my day to day home device.
If you're looking for something security based, TAILS is always a fun tinker, but I am not sure it's a daily driver TBH If you're looking for a mac type experience, Elementary OS is a nice desktop
Disclaimer - I am not endorsing any of these products, nor have I vetted the companies to make sure they meet any expectations, you're responsible for doing your own diligence before taking any action.
If you're a GenX member you might remember moving between MSDos, DRDos, and IBMDos - I feel like this is a fair parallel...
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