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Youve found the right place and it sounds like you are doing all the right things!
I will note about the computers that current Gen Macs are exceptional at running lightroom, in fact I upgraded this year to the M4 Air because it balanced handling big full frame raw files in a travel friendly weight. I would think the M5 would be a monster, but rest easy knowing the m4 models can handle pretty much any still photo very smoothly. I know quite a few full frame shooters still using their M1s with no complaints.