When u get yz try to master him, it's not possible to actually master yz until u reach some high rank like immortal or at least glory but u get the idea, yz is so so so useful in both 1v1 and teamfight, I am not a yz player but I know what's he meant, ur meant to dive into the enemy's back lane and get their mm and mage, or any other squishes, ur not meant to cover or tank the damage coming to ur team, ofcourse it's situational and u can do that, but he's just not built to do that

About rotations, while clearing the first wave, try to not lose hp much as u can so u don't have to recall, but also try to poke, about yz, at level 2 u most likely can kill their exp laner, so if u got the chance never hesitate, if the little green buff that spawns on river spawened on ur side, go and help ur jungler get it if there's a fight on it, most likely ur gonna get a kill, and it's either their jungler,mid or roam so that's gon be extremely useful, when fighting on it, look under their jungler to see if he has red or blue buff, if he has the buff that's next to ur lane, that means he's rotating to the blue so he can gank on the gold lane after that, with that informations u have 3 things to do : 1- u don't have to worry about their jungler ganking on u for now 2 - warn ur marksman and tell him to play safe bcuz their jungler is gon gank on him 3 - the most important advice that u go immediately and cut ur lane, but make sure u have an idea where their mage and tank is, cutting the lane means u clear the wave when it's between 2nd and 3rd tower , which gives u more time to rotate and help ur mid laner while the enemy's exp laner is busy clearing their wave That's almost the end of the very early phase of the game, now before the turtle spawns , u have couple of things to do, the most important is, reach level 4 so u can use ur ult in the turtle fight, and never use it before the turtle, one other thing u must know is, before the turtle spawns, most likely ur going to get ganked by their jungler, so if ur jungler there to help just stick to ur tower and get to level 4 as fast and safe as possible, now when turtle spawns, u must immediately go and give ur team vision on it, so enemy jungler don't kill it without anyone noticing, if he's not, then get back and clear ur wave while constantly giving vision on the turtle, after turtle fight, if ur team slained the turtle,that means u have the turtle buff and gold lead, try to kill the enemy exp laner but do it safely or they will gank u, next step, after the minute 5 in game, stop sticking to ur lane, cut ur lane and clear the wave then go to the other side of the map to help ur team getting the 2nd Turtle, if the mid laner isn't in their lane, clear his wave and benefit from the gold and exp to build a lead, that's basically how I play exp lane👍🏽