First clear:

Start Blue side and level Q. Kite blue buff around and use q whenever it's up. Smite blue if you don't get leashed and smite Gromp if you do get leashed.

Level E after killing blue and Q-3 auto's-E the Gromp to get max damage from E.

The rest of your clear is similar. Just use Q on a camp, auto 2 times, then w to fill your passive stacks again then auto 5 times then use E to kill everything.

Xayah can do a 5 or 6 camp clear relatively quickly. If you're afraid of being invaded when you get to red side you can also do the spaghetti Blue-Red-Raptors-Wolves-Gromp clear.

You have decent ganks with your q-w then a few autos into stun E.

Don't look for many ganks early. Only go for ones that are free. Xayah scales well and you want to farm and counter-jungle the enemy to get lots of cs. After Noonquiver Xayah can actually solo drake relatively well. Just make sure to auto 1-3 times after every ability to get the maximum amount of passive autos to set up your E damage.

You want to play around drakes more but if your top or mid laner is fed take herald to help snowball them.

Keep farming jungle camps and minion waves. In teamfights try to always have feathers on the ground around you to be able to E instantly when something happens.

Remember Xayah is squishy so let your tanky and bruisers engage first and bait out key enemy abilities.