To learn to type without looking at the keyboard, you just need to follow two simple rules and take some time to practice
The starting position — is the position all of your fingers on the keyboard should occupy. Look at your keyboard and find the "F" and "J" keys. If you look closely, you will find bulges on them. They're specially designed for those of us who want to learn how to type blind. So when you find those bulges you have to put your index fingers on them - this will be the starting position for them (they must always return to those keys). Place the rest of your fingers as shown in the keyboard example below. You should also mentally divide the keyboard into two zones: for the right and left hand respectively. Each hand will work with its own zone.