I need help... My poor cat got outside for the very first time. He is two years old and he is stuck undernieth my apartments right under mine and it is big under there! I can see him but he won't come to me but when I'm home he fallows my voice how do I get him out

If there is an opening large enough for him to get in and out, and he is not stuck where he can not move. Then he will or should just come out. Put some nice food, near the opening, and he should come out at some time.

Agreed, tiny bits of food leading to your door, and water