I want a recipe for a roast in the crock pot, i just baught it and have never used one... im 19 and learning.?

I baught a center cut roast, a bag of carrots, an onion, a bag of potatos, and a box of onion soup mix... what exactly do i need to do... do i put it all in at once??? i work from 8-4:30 can i leave in all day?? Please help me im trying to learn how to cook, i want it to be really tender to.. any advice or help?? how much water do i put in the crock?