How to adjust to the news?

Hello, I have just been diagnosed as having diabetes, I am quite shocked and feeling very fed up. Can anyone give me some advice of what to expect what I should or shouldn't be doing, I have read all the leaflets that my drs have given to me but they aren't very clear of what to expect or how to live with it, is my life going to change alot and if so in what ways? any advice is helpfull, thank you Helen xx