Moving around the keyboard in general without looking at it requires two things:
1. an accurate map of the keyboard, i.e. you need to know where the individual keys are in space.
2. an accurate map of your body, i.e. what range of motion you have around every joint, and where any combination of movements will put your fingertips in three-dimensional space.
Sounds complicated, but I'd encourage you to work on this as you move along. It will take a lot of time (years), but it will be easier if you pay attention to it.
When you have thoroughly memorized a piece, play it without looking at the keyboard; feel your way around. If this is impossible with what you are working on at the moment, go back to simpler pieces, such as those that use only five notes without moving the hands. Slowly create your map by practicing short intervals first (2nds, thirds, up to an octave), then start moving the hands by one, two, etc. notes up and down the keyboard. Finally, move on to pieces with larger intervals, i.e. jumps. At the moment, you will need to look at your hands whenever necessary, you don't have a choice as your keyboard and body maps are not yet developed. But at any given moment, you should need to look only at one hand, the other one needs to be able to play on its own. If that is impossible, even after practicing for a long time, the piece is too hard (but don't give up too soon).
Good luck!