It's pronounced Diane. I do data architecture, operations, and backend development. In my spare time I maintain Massive.js, a data mapper for Node.js and PostgreSQL.
If you use the terminal at all, a lot of the concepts will transfer more or less directly (OSX is based on BSD Unix, which is a near relative of Linux). Instead of /Users/you you'll have /home/you, instead of launchd you have the much nicer systemd, and most distros have a proper package manager built in. The graphical interface is effectively a matter of taste with Linux; you can install and run any of dozens of different window managers, and most are very customizable.
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If you use the terminal at all, a lot of the concepts will transfer more or less directly (OSX is based on BSD Unix, which is a near relative of Linux). Instead of /Users/you you'll have /home/you, instead of launchd you have the much nicer systemd, and most distros have a proper package manager built in. The graphical interface is effectively a matter of taste with Linux; you can install and run any of dozens of different window managers, and most are very customizable.