What is the absolute best 4k monitor for a ps5 because honestly i am so lost looking at all these numbers and letters?

So i finally managed to get a ps5 after saving up for like a year and im still playing it on this old 1080p tv i got from my parents like five years ago. I live in a pretty small studio apartment in Chicago so i dont really have room for a giant 65 inch tv and i heard monitors are better for like response time or whatever that means. Im sorry if this is a super basic question but every time i look online i see people talking about hdmi 2.1 and vrr and 120hz and my brain just kinda shuts off. I just want something that makes games like the new spider-man look really pretty but also wont make me lag when i play call of duty with my friends on the weekends.

My budget is probably around $600 maybe $700 if its really worth it but i dont want to spend money on features that the ps5 cant even use anyway. I looked at a few things but its all confusing:

• some say IPS is better
• some talk about ghosting which sounds scary
• some have speakers and some dont?

Is there a specific size i should look for? I saw some that were 27 inches and some 32 and i dont know if 4k even looks different on a smaller screen like that. Also i saw some talk about oled but those seem way too expensive right? I just want something that works right out of the box without me having to go into a million settings menus because i will definitely break something. If anyone has like a specific model they love or just some advice for a total beginner who has no idea what they are doing i would really love some help here. I'm hoping to buy something by next week before my vacation starts so i can just game the whole time...