Cutting out specific parts of images/Beginner looking for help/Daniel Walter Scott

Hey, everybody. I started learning Photoshop this month and this is the tutorial I've been learning from:

https://www.youtube.com/watch?v=IyR_uYsRdPs

I went along practicing with the whole thing, then this past Saturday I watched from beginning to end without practicing along just to refresh/understand more of some things (I don't remember everything as expected, but I thought it might be helpful doing that). 

One of the big things I want to learn is not just combining parts of images, but learning to cut out more detailed parts. I know the lasso tool does that, but I'd like to have a good lesson on it and find out if there's another tool that I can use. Dan doesn't cover that in the beginners course and I didn't find him talk about it on YouTube so far, so I'm wondering if he does in his advanced course. I'd have to pay for it on his website, which I don't mind because his free course helped me and I'd like to support him, but I'd like your opinions on different lessons or if he does cover it in a free lesson.

I want to learn general compositing, such as collages. Thanks for any help!