Need a lil help please

mother of 2 💖💙
Hey ladies, next month I"ll move to a 2 bedroom apt, well my daughter 4yrs & my 2nd child ( a boy) will be sharing room. Any advice of how to decorate their room? I am not a person with ideas of decorations lol I will like to so something simple but pretty. Yeah, I tried google, YouTube, no help at all😩😩😩