I will assume that's a listing photo, and elderly couple moved ?: )

I will assume you want to face the tv and rip the carpet ;;;;;

Nobody can "design" it- you've told us nothing as to your style, how many will live there aside from you, what you like or anything else.

More context............is necessary for "design".

!/4 inch to one FOOT Assuming you want to face tv.

( please no sectional) don't WALL off the entire space

You need a lot more context for "design...like a few inspo pics!

Rip the carpet would be best first start

Thank you so so so much Jan
Really appreciated