This tutorial will introduce you to the idea of how to move a PictureBox around the a Form, and the basics of collision detection. There are two versions. One will use clickable buttons to move your character and the other will use the keyboard to move your character.
Make sure you are familiar with:
Choose which tutorial you wish to use:
You can download the finished tutorial program to help if you wish, but should make your own as you progress through the tutorial.
I also recommend that you use the Keyboard Events tutorial to use the arrow (or W,A,S,D) to move your character around.