HIya!!
Welcome, and congrats on your first step towards your new life!
Yes, you can mix coffee with any flavour, hot or cold, smoth or blended with ice. You can get as creative as the diet allows. You can also use the water flavourings to change the flavour of a shake - you can mix half and half, making a Strawberry-Banana, or a Chocolate-Raspberry shake, etc. You can blend and pour over ice - or you can blend with ice making a smoothie/frappucino type drink.
Right now, my ultimate favourite has been Chocolate, 3 hermaseetas (yes yes - THREE of them - its the only way I can make the chocolate actually taste like chocolate!) blended with strong brewed coffee (heaping teaspoon of instant if I have no fresh brewed) and a small handful of ice - just enough to make it slushy but not frozen. ITS SO GOOD!!!! Taste just like a Starbucks Mocha Frappucino!
You will find a thread in the sticky's with other recipe ideas, but I would suggest personally - keep it pretty simple for the first week or two while you get your head around it all.
Just remember - you only need to do this one time, and if you keep your nose down and remain 100% your time will not only be faster - but easier! It is possible!
Here is a little phrase many of us like and relate to that might be good to just tuck away somewhere in your memory to help you when times get tough:
If you always do, what you always did, you will always get what you always got.
So - the time for big permanent change is now. Dive in, get your feet wet, and come out a winner!
Good luck!!!