No creativity

Hello! I am an artist (sorta idk if i can even label myself that) but I have such an issue with creativity. Like I have so many creative ideas for paintings but when it comes to drawing in my sketchbook I ALWAYS have to open Pinterest. I wish more than anything that I could just draw but I can't draw anything original, im more like a copy and paste person than an original artist. I feel so stupid about it and I wish I was more creative. Does anyone have any advice?