What can i do to get better at long jump or triple jump?

i am doing long jump and maybe triple jump this year for track


i know how to count and measure my steps but i dont know how to take off on long and triple jump


please tell me how to takeoff on both jumps





also i wanna know how to get a longer distance on both jumps


right now i do 14'6'' for long and 27 for triple


tell me how to get a longer distance with exercises and techniques to do during practice|||Practice 20 m sprints...