I am seriously considering pulling the trigger on a switch to Linux. Looking for advice and discussion

In terms of hardware, what are some good cost effective resources and what what things might I want to consider differently than what I am used to in both the Mac and Windows worlds? I need smart home management, a plex hub, and photo editing, as well as the usual other stuff.

EDIT: I use Capture One for photo organizing and editing. I have old computers I can repurpose for this endeavor, but they are pretty old. My main thought for this post was looking into what kind of hardware I could consider for building a new Linux system from scratch. I am very much am inclined to switch to Home Assistant,because Siri is dumb as a bag of rocks, and AppleHome does not have the features I want and is extremely buggy. Everything I have currently is in the Apple ecosystem, and my daily driver is an M2 Mac Mini. I am not inclined to put Linux on the Mac Mini at this stage. I use the complete Proton suite for all that stuff. Thanks!