Adding lamps on the nightstands, a lamp on the dresser, and a floor lamp that shines down near chair would help a lot in making the room feel brighter.

A few ideas in accessories to brighten your room:

Move to jewel tones in drapery and pillows for the bed and chair. Use white bedding to make it the brightest of focal points. Look for larger bed lamps in ceramic, lucite, or shiny metal - budget allowing, hanging them from the ceiling would be lovely. Trade the coat rack and floor lamp, which are darkening that corner, for a vertical plant and small up light hidden at the base. Add a reading lamp to your chair. Find a beautiful throw to brighten the top of the trunk. Most importantly, choose things that knock your socks off. Happy shopping.

It
is a lovey room. You could add floor
lamps. A brighter dresser and TV stand
would also help.

Pretty room already. The bedding looks great with the wall color.

Half the window area is blocked by the air conditioner and shades. I suspect the air conditioner needs to stay up but could you remove the shades or roll them to the top of the windows?

What about adding a white/cream rug to the room? If it went under the bed so you step on when you get up and extends several feet beyond that probably is best or a smaller one that fits under the chest and chair's front legs.

Pictures with white frames and matting would add brightness to the pretty walls.

More light sources for sure. Amazing what a difference in a room when there are 2 or 3 lights on versus 1.

I'd put the TV on an articulating wall mount and put the stand against the wall. Not sure it would brighten the room so much as make it a bit more serene without the screen cutting the corner of the wall like it is now.