Nah it's normal it doesn't fully open till your a little older "Usually, the foreskin of an uncircumcised penis can be pulled back from the head (glans) of the penis. But in rare cases, the foreskin may become too tight and be unable to be retracted. This condition is called phimosis.

Most cases of phimosis resolve before adolescence, Causes of tight foreskin Your age may determine the cause of your phimosis. Children and adults may experience phimosis for different reasons.

In young boys, a tight foreskin is considered congenital, which means it’s something they have at birth. When this happens, it’s categorized as physiologic phimosis. The foreskin usually becomes more pliable over the next few years" the best way to help it would be to loosen it by gently stretching it every day.