can somebody give me ollie advice

i started skating maybe 3 or 4 months ago w really good progress ive got my ollie sorta down i can bring it up but bringing my back truck up w me is a bit harder

ive been told to crouch low when youre starting out, pushing ur foot down like a petal to get the pop action, and to keep my feet close i think but i can't tell if im improving

whats the advice on how to pop while moving, ive only been practicing my ollie on grass