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.
In terms of hardware I suggest AMD and never nivdia…
Do your homework on WiFi drivers and Linux installation first if you plan on installing over WiFi.
GIMP is great for photo editing on Linux.
Check if any other apps you can’t live without have a suitable substitution or can run efficiently and easily with WINE.
Ubuntu snap is a mess, look it up.
Read the wiki of your chosen distro if you have problems or get stuck before asking technical questions, 9/10 times the answer is there.