I can't imagine actually spending money on a 24" 1080p monitor for anything but a super budget build, unless your #1 use for it was becoming a pro cs go player or something.
Especially for productivity stuff.

Your PC won't have any trouble with more/higher res screens, my PC is worse (3900X + 3080) and I'm using 2x 27" 1440p monitors and a 28" 4k. I'm seriously considering swapping the second 1440p monitor for another 28" 4k.

Personally I'd say get one monitor that focuses on gaming and another that focuses on colour, but two of the same is fine as well if you thing you'd get annoyed at differences in colour, I do find this slightly annoying with 3 different monitors but not a big deal.