Where are you finding OLED monitors in India?
If possible prefer getting a good gaming laptop + an external monitor. Like if you want something now. get this:
Buy ASUS TUF Gaming A15 Laptop 15.6" FHD 144Hz Ryzen 7 4800H, GTX 1650Ti 4GB Graphics (8GB RAM/512GB NVMe SSD/Windows 10/Bonfire Black/2.30 Kg), FA506II-HN152T Online at Low Prices in India - Amazon.in
Attach it to a good monitor, there are 100% sRGB coverage 24" monitors for 10k, like BenQ GW2480 or something like Acer VG271P for 19k. Add additional 8GB RAM & another SSD to it, you will have a great setup on your desk. You can carry it when required. IF portability isn't required, get a desktop.
Surely TUF A15 doesn't have best of thermals, but put it on a cooling pad & maybe create vents on the bottom panel if you have DIY spirit.