STAY AWAY FROM HILLS!!!!
I told you it wasn't gonna be that easy at first Eru! It takes plenty of practice. If I were you I would have someone rent a manual for you to practice on. You could burn your transmission out with all the gear crunching you are doing right now. I bet it sounds pretty scary everytime you shift right now... if the car doesn't stop cold.
It will take some practice. Jimmy's advice was pretty good. It's all about developing clutch control! Don't worry about mistaking 4th gear for reverse, you'll figure that out soon.