Living rooms decor

I have 3open living /guest rooms that I need to have help in having decoration and better use for the space(mainly curtains, frames, accessories,...etc), without changing the current furniture , or conducting any kind of hard structure charges (Unless its easy and no handyworkers needed) Ideas should be supported with pictures and proposed items shall be easily found in the market (not expensive) I can share photos for a rooms, and ideally I would like the freelance to ask me and get to know me more to better understand my taste