There's an old program called ImageForge. You have to pay for it now, or use a trial. Once upon a time, it was free, and I kept the free version. I just took some online clipart, removed the hat from her face, and put it on your profile. Glad you tried it on.
There are other free programs people use now, but they make it so complicated to do the same. It is so much simpler on (the old version of) ImageForce.