Hi I'd like to buy a PC or gaming laptop purely for gaming purpose but I know nothing about pc specs etc. Been playing Playstation since I was a kid and only use my home old laptop for studying.

What type of laptop / pc should I buy if I want to run games on high / ultra high settings? I'm not picky just want pretty graphics and smooth fps. I mainly play single player games and some online games like cod, battlefield, wuthering waves etc. My budget is 5k is that enough for a mid end pc / laptop?

Sorry for the noob question.

What resolution are you planning to game with?

I think 1440p. Honestly I'm clueless I usually play on 4k with consoles and tv but for computer I don't know much sorry

Some of my friends told me to buy MSI or Legion series. They just say those are very good but didnt explain much to me

Nah, not possible. Graphic card pricing is obscenely high these days.

Here is one with 5K but doesn't really meet your requirement.
Ryzen 5 5700X3D RM1199
Thermalright PA120SE RM155
MSI B450M Pro-VDH Max RM349
Kingston Fury Beast DDR4-3200 16GB Kit RM329
Gigabyte RTX3060 12GB Windforce OC RM1259
WD Blue SN580 1TB RM359
FSP HV Pro+ 650W PSU RM249
Lian Li 205M Mesh RM189
ASUS VG249Q3A 24" RM639
Misc. Peripherals RM300

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The ideal world with budget conscious build (2K screen):
Ryzen 7 7800X3D RM1599
Thermalright PA120SE RM155
MSI B650M Gaming Plus WiFi RM799
Kingston Fury Beast DDR5-5200MHz 32GB Kit RM539
MSI RTX4070 Ti Super Ventus 3X RM4490
WD Blue SN580 2TB RM569
FSP Vita GM850 PSU RM609
Lian Li 205M Mesh RM189
ASUS VG27AQ3A 27" RM1159

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Forget about laptops, they are prone to run into high temperature and forced to slow down.