Mine went something like this:
Week 1 - 4 injections (in belly fat) at the hospital over about 2 hours (no stay)
Week 3 - 2 injections (in belly fat) at the hospital over about 5 mins (much quicker)
Week 4 - Med's delivered to home
Week 5 - Home visit by nurse to show how to do it yourself (it's kinda like an epi pen)
Week 7 - Did it myself - dead easy! takes about a minute from start to finish
Week 9 - Repeat
Week 11 - Repeat
and so on.
It's good stuff! Leaves a little bit of an itchy lump about the size of a 5 pence for 24hrs. No other side effects for me.