FEATHERING THE EDGE OF AN IMAGE

I'm 82yrs old and have an autism that makes it very difficult for me to understand written instructions.  I live in the UK and wondered if I could somehow make arrangements to set up a phone dialog with someone in 'The Community'  where I've got the opportunity to say if something isnt clear to me?

So, I have Photoshop Elements 2021 installed on my PC and I've been tearing my hair out trying to work out how to feather the edge of an image.  I'm sure its pretty easy to do, but for me its making me lose the will to live!!! (not seriously)