Hello Adarsh,

I can understand the need for a simple makeover for this room , given that you are a student, budget might also be a huge constraint for you. A few tips :

Lighting is key, Invest in a good downlighter (not a tube) right above where you study, be sure that it is not placed above your head as there are chances you will have your shadow on your books.

Buy a standard desk which is a minimum of 90 cms width, make sure it is clutter free (including your desktop )

use a pastel colour (suggest beige or light chocolate or tan)on the currently purple wall. Purple can sometimes be too strong and overpowering. (A reason why an interior designer has to be consulted when someone builds a house, everything that looks good on something else need not be the most appropriate on your walls ).

Have some plain straightline bookshelves (you can get them online) on your wall that can help clear the clutter off your desk.

Invest in a good ergonomic chair which can be tilted back or revolved as needed . A straight back chair will also do good to your posture.

Have a small rug with some floor cushions on your floor for some floor reading area so that you dont have to plop yourself on the bed and then end up dozing off !!

Hope this helps you

Smitha