Kayn OTP, reached rank 1 on him on Porofessor.gg, and hit 1k+ LP Challenger for two seasons, can coach you everything you need about Kayn, and jungle in general if you'd like.
English & Arabic
Challenger rank 2, 1273 LP peak
Basic training plan
League of Legends
Live gameplay with voice, (from my side).
Lesson 1 1 hr live session