They will run through everything with you, show you what to do etc..
Take paper and pen with you so you can write anything down, if you don't quite understand what they are saying, then don't be afraid to ask to explain or expand further... They pefer that you ask them to repeat than find that you've not quite grasped what they say..
They will use your BG readings, weight, food intake to calculate your starting insulin, this will be calculate with an air of caution to avoid hypo's and then they will adjust from there, they will also monitor you closely and adjust your insulin as you go accordantly..
But you be fine..