Hello, Myself Pragya.
Being an Architect and interior designer, I have earlier worked on many house interior design projects and I can certainly come up with a good design, and 3D rendering of that design for your son's room.
I have been working as professional Architect and Interior designer for last 5 years.
I am quite handy with Autocad, 3D modelling software like Sketch up, Revit, Lumion, 3DS Max and Solidworks.
I provide all sorts of architectural services, e.g. Site planning, 2D CAD plans,accurate 3D model of the interior and exterior of spaces along with realistic rendered views with nice lighting, colors, textures, furniture models etc.
Please check my profile to see my work and reviews from awesome clients that I have worked with.
https://www.freelancer.com/u/pragyajprajapati?w=f
Warm Regards