With your index fingers you can feel a bump on the keys 'F' and 'J'. When you type you must get back to these two keys as soon as a key has been pressed on the keyboard so that you know all the time where you are on the keyboard. If you don't find the keys 'F' and 'J' again you will get lost and make a lot of mistakes. For the same reasons the first lessons are done without ever moving your fingers from these two keys.
Those who use only two fingers often type as slow as 10 words per minute although some are capable of surprising fast speed with this primitive technique. After these lessons you should be able to type at least 35 to 45 words per minute. After some months of experience and regular typing you can reach 90 words per minute or even higher. As with everything else practice makes perfect. You can follow your own progress by pressing the button 'Statistics' in the top right corner, you will be able to follow your progress online after each lesson.