Room crisisssss T_T

I need some tips and advice on my bedroom,so my old bedroom is currently my old aethestic rn because I didn't really know what bedroom I wanted when I was 10-12 and now I'm older then that.And from the inspo pics I always wanted my room like that but idk if my wall paper will suit with the posters I want.Because I do find the wallpaper cute with positive comments,but idk if will fit with my current aethestic unless I have a different colour light on and on pic 2 that's where my fairy lights will be and there's lots of room on that wall to put posters on definitely.But idk if it will all go together and maybe I could put some posters on pic 1if I wanted too but,also my parents said I'm staying with this room until I move out and my room is almost finished and they won't allow me to do my room myself because I also still have another few years until I move out like 6 or 7 years,and plus I still have half a year left until I leave school I don't leave secondary school until next year.So could posters and decorations like vines and mushroom lanterns fit well with this wallpaper or not?