I am also new to vaping but, from what I've read, water won't do the trick. I have used glycerine - an 8oz bottle was $2 at the local drugstore. Glycerine is the base liquid in VG (as apposed to PG) ejuices.
When I buy ejuice from tastyvapor.us, for each 1oz of "with nicotine" I buy, I also buy a 2oz. of the same flavor with no nicotine, then I mix them to get the strength I want.