Thank you for your reply. I understand how to do that, but when colors are similar between where I want to select and where I don't want to select, I find that Quick Select doesn't work well and I can't refine the edge to where I want it to be. Any suggestions?
You can turn the selection into a layer mask and do as many combinations of painting with the brush tool, refine edge, ect as you'd like. Also, if there isn't enough contrast for the quick select tool, a tip would be to go into the channels panel and find the channel with the most contrast, then boost the contrast with a curves adjustment. That can help immensely.
And the edges are somewhat smooth, you might give the Pen tool a try.