While in normal mode you have access to many powerful motions to help you navigate through code.
Let's start by learning the basics. Use the hjkl keys as indicated below to move one character in any direction.
Vim is about efficiency, which means staying as close as possible to the home row keys.
The arrow keys are intuitive, but using them requires you to move your right hand completely away from the home row keys. This is inefficient.
You should rest with your fingers on the home row keys, even though this makes your right index finger responsible for hitting both h and j keys.