I want to have an undercut at the nape of my neck. Am I better to go to the hairdresser or barbers? Would love one if the patterned ones like you see online a lot as I do wear my hear in a top knot a lot, but it's also because I get hot really easy and a lot of my hair has broken round the nape of my neck and looks dreadful so it would be cooler (as in temperature wise) and neater. It's not so much to be trendy (though that's never a bad thing) but I don't want it to be badly done and have to hide it either. Thanks