i can kickflip 2/3 times prob but im having truble kickflippin at an average pace and down curbs?
any tips???

god go to youtube or something.

just pretend your doing it on flat ground
make sure to pop the secret to high kickflips is pop

it feels scary but its not just pretend your like standing still but there is a moving background behind you

Be sure that you aren't too eager to land the trick, like the person said above, pop harder, becareful of where you're landing. Look at the landing area lol don't suddenly land on halfway on the curb and street at the same time.

ignore the fear and just go for it.
its hard but if you can get that its very simple :D
good luck dude .