You must get perfect layout placement and check bedroom designs from houzz bedroom designs.

You're welcome! Yes plain walls of same colour in light tones will look good or go for plain white walls and some subtle grey texture(very light). These battens can be made by local carpenter by using wood or MDF board and then painted.You will easily get enough YouTube videos or try searching board and batten walls on Google to help you understand the process and time of making it.That way you can decide for whether DIY or with help. In case you are from Delhi/ NCR ,drop me a text at archshivanichandra@gmail.com to contact for a free visit and help. Hope this helps! Thanks Shivani Chandra Architecture Intern

It's very open ended question , pls share floor plan, pics and requirement details to get a better estimate.

do you want to renovate your bedroom?