Hair cut help

I'm planning on getting my hair cut tomorrow. Right now it's about the middle of my back. I did a viviscal make-over and want the picture below. My friend wants to be a stylist, so I asked if she could do it for me. She's never done an actual hair style cut before (just trims and stuff). So does anyone have videos on how to cut hair? Or have tips? What kind of scissors do you use? Do you cut it wet? Any an all help is very much appreciated! Thank you!

My trip to the salon

So 2 weekends ago i decided i need a hair cut. I went to the salon and asked the lady for a long layered cut. My hair was pretty long and already had layers in it. I told her i wanted to keep most of the length but didn't mind taking an inch and a half off. Well she cut 4 inches of my hair!!!! I was so sad it took me almost 9 months to a yr. to grow out even while using viviscal max. I didn't know exactly how much she was cutting bc i wear glasses and had to take them off. So i couldn't see till she was done :( i'm bummed out. Now i'm scared to go get a hair cut or trim.