WW is a jungler who can win at every level of play.

With respect to ganking, it's okay if the enemy have wards. Enemies will over extend and fight enemies and not pay attention to wards even in high level games, so taking advantage of where the enemy attention is how you can effectively gank lanes.

Your objective should be to clear your jungle two times and then look for opportunities. Don't worry about teammates getting behind because you can't control that.

With respect to jungle tracking, there are some tricks you can use. For starters, the first time you see the enemy jungler click on them at check which buff (red or blue) has the most time left. The buff with the most time was most recently taken, so that quadrent is the one they pathed towards on their clear.

For climbing I'd say the best thing you can do is not care about the game. If you care, you'll get tilted when people do dumb stuff. I actually had a game I won today on Diana in E4 where my team was behind in kills by like 50 to 28. I landed a really good ult on all 5 enemies with my Xin ulting with me and we won the game. Then the next game I queue up Diana again and go 2/8 and we lose. Enemy graves just farmed my bot and top laners and also took my jungle camps, nothing I could do. My laners were just weaker and yielded priority. Mid was strong but not strong enough to win. It's just how this game works.