How to team right with jungle

I feel like the squishiest mf in the game. I basically have become a OTP with nocturne, I crush it with him no problem. I also been trying to play talon and rengar mostly. I just die and that’s it. My strategy with rengar is try to ult and sneak onto a back line squishy, and with talon I try to utilize my terrain jump to suprise burst someone.

Here is my observations: lanes are so small in this game, and rarely do people set you up. Like just push push push and fight on the towers. I can’t do anything with that. If the conditions are right position wise things usually go ok.

TTK on this game after a couple items are online in the mid and dragon lane you cannot walk up or your 25% before you can hit your gap close if you even have it. Or a single cc including a heavy slow and your done. Tanks also can out damage and our sustain fairly easily.

My builds are usually the AD pen items to start, I buy the shield reducing one when I see those going up a lot. I recently started going edge of night earlier and that does decent actually.

Anyways, I can keep going on and on but I need some general jungle gank and team engage advice.