Your success on guitar, or anything in life, is directly related to the effort you give. Is it true that some people are more gifted than others when it comes to music? Of course, but don’t go around thinking you can't learn guitar because you weren’t born with the right musical aptitude. That's nonsense. Some people may be more gifted, and you can't control that. What you can do is control how hard you work, and promise yourself that nobody will ever outwork you.
Then, play the notes again on the first string, but in reverse order: fourth fret to open string. Then go back to the second string, back to third and all the way back to the sixth string where you started, playing the notes in reverse each time. When you’ve completed the cycle you will have played each note on the first through fourth frets on each string and back again.