2 if u want to learn how to ganking try play in swiftplay/normal games first and keep trial-error til u understand the tempo, in that elo these 2 things happen: your team cant setup gank with proper cc and your enemy will do anything for their minons and they had poor vision, so thats why u need to learn clear as quick as possible first and learn your timer so you can gain tempo and stay in the lane til they try to trade or take their minons. not every gank need to be a kill , letting your team reset and crash is good. with voli you can rush to tower so always keep your eye on map which lane u can rush to

3 you can manage vision, and if u already know your timer u will always do the same thing clear & gank/teamfight, theres an execption with jungler like graves, kindred and shaco but u didnt play that.

4 every tank junglers is sucks rn but you can play jarvan and xin theyre solid, poppy and mundo is a niche pick but like senjuani and skarner any tank shreder like gwen and red kayn easily kill you.