[insidious]

Get a Lenovo with a nice IPS display for Graphics work.

You don't need anything super crazy if you're going to just be using Photoshop, but if you get into the more advanced stuff like Video Editing etc you're probably going to want something more powerful

School/Mixing also doesn't require anything that powerful. If I were you i'd save some money and go with a Windows Laptop with better specs than the macbook you would get for the same price.