AE controls query / PC and MAC

I believe the shortcuts are mostly if not completely identical. The few times I've had to go cross-platform, I don't recall any shortcuts not working right. The basic conversion to remember:

CTL = Command
ALT = Option

One caveat: The modifier keys are in slightly different positions, so that may slow you down a little. Many's the time I hit the Windows key while my hands were running on shortcut autopilot.

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It is easier to destroy than to create.
More fun, too.

One other minor difference is the location of the Preferences menu item.

On Windows its at the bottom of the Edit menu, on the its on the After Effects menu which is just to the left of the File menu.