( just for the purpose of explaining my idea, I put a pic of the most wonderful guy )

My question is---
-let’s say that I want to remove/erase the fence and the building behind me. I know I could erase everything by just using the erase and cut me out of it but this is a tough and tedious work.
1-Is there a way that I can select a point on the fence and then press- erase everything from this point behind.
2-Or another way would be- let’s say I am focussed at 10 feet, I select depth of field ( it should also be able to tell you, while hovering over your picture, which is the depth of field of everything ) Then you select- erase everything farther than 10 feet.
So, do these features already exist? If so, where can I get some tutorial for using them.

Big Thanks
Happy Easter
Pete