Learn Photoshop

Hello Community,

I am looking for some current references for learning Photoshop. Having some trouble with something  specific and online references are not helping me. For example, I have an image with a person in the foreground standing on a patio. I'd like to replace everything except the person and the patio with a vineyard.  So the new image will be the person standing on a patio (holding a wine glass) with a vineyard (I have a few vineyard examples already) in the background.  I'm sure this is possible, I just don't know how to make it look like the person and vineyard are one image. 

Looking for some resources that I can practice and follow. A class would be great to take also.