Is the dustin dollin 7.5 baker board any good?

i just got the 7.5 dustin dollin baker board 4 hours ago and whenever i try to do an ollie i always can keep my foot on the board. is it because my board with is small? i am 2 years old going on 13 june 13th and i wanna know is 7.5 for my age ba or why cant i keep my feet on the board?