whoof, definite cave potential! at least you have a lot of colorful accents...

Pink is mentioned, and I'll ask how youthful you want the room? I might try other than usual pinks, which often are a candy pink.... ?

So, a couple items more muted.

i havent thought about how youthful, but i think i want it to look mature(?)

Perhaps paint the long wall only at first and get a feel of a focal wall and paint the other walls beige. If you are fine with how dark room might feel, finish rest of room.

If you have left over green paint you could paint your wardrobe and add a rod and a drape to hide contents (add one on windows also). Add additional pink with bedding, rug and art and you‘ll have created an eclectic room

I happened to find a similar room -- how high are your ceilings? You could add trim as this room has, neat looking if the same height as the door's top.

Dining room wallpaper ideas · More Info

My ceiling is around 2.6 meters, thats such a nice idea

I had to type it in, so it's 8 and half feet ? do you feel that ok, I'm supposing so.

You bought the paint, but did you buy the mural? I think nice canvas art could bring its look in.