Help on my pop up

Ok so ive been surfing now for almost a year and i have my pop up down on my longboard. I can pop up bottom turn and start to walk some. No ive had my shortboard for about 3 months now and i had a little trouble at first but then started to pop up a little and surf it. Now all of a sudden im back to square one. Im having the hardest time getting to my feet. The issue i have is on my longboard i can use my feet to help me push up and get my pop up, obvioulsy on my shortboard my feet hang off. I try to pop up and end up knee boarding it down the wave or completly fall off the board. ive researched ways to practice this on dry land and all i see is just practice the pop up (which doesnt show me or nothing what im doing wrong) and the other is what i saw called the chicken wing (which looks like it would take to long and also drag my knee in the water). Please help me figure what i need to do. Do i practice popping up with my knees instead of my toes on dry land or should i work on this chicken wing techique till i get the pop up down? Thanks yall