Oh I see. I use my Macs (at home + work) as daily drivers, though I rarely use the right-click action iirc - so much of working on a Mac only requires one left-click. Also I use the Terminal to log into a work Linux, so a lot of keyboard interaction too, and like alt-tab and such.

But it sounds like your UX is entirely different: if you rarely use the Mac itself, and/or then use an external mouse the vast majority of the time, and even then don't do right-click actions constantly, then I see what you mean: you almost may not even have trackpad experience!?:-D It would then be harder to retain yourself to do differently, and the few times something doesn't work would stick out in your mind more in that case. If you think you'll keep needing to use a Mac setup in the future, you might try to force yourself to get used to it - like pick a slow day of the week and don't allow yourself to use the external mouse and only use the trackpad. Like learning to type in QWERTY rather than hunt and-peck, building habits takes time but does have a pay-off:-). Even if you don't need to do this, it could make the whole experience more pleasurable i.e. less painful for you! Ofc you know your setup far better than I, it was just a thought, in case it helps:-).