You should get a bunch of info from Shared Solutions and they will send a nurse to train you.
They have charts that will you show you where the shots go.
I have only been using it since April and haven't had any trouble.

Agree, I use it too. There is a lot of info and you can have your journel sent to your email every month

I take Copaxone too, I have found if I use the ice pack on the location you don't really feel the shot. And I don't do the back of my arms, it hurt! My doc and Shared Sol both said that's ok. My schedule is right hip or thigh Mon left hip/thigh Wed and then stomach on Fridays. Helps me remember.

After a while giving yourself an injection will become like second nature.

The best app, that I use for my Copaxone 40mg injections - Injection Tracker & Reminder on App Store for iOS. Works very good, have all rotation options, schedule, logs, etc.