Xayah starts with = W
Rakan starts with = W
Run instantly as the spawn have opened too bot lanes enemies bush, get as close too the towers as possible but still stay in bush (Stay in the corner of enemies bush basically)
Wait for the enemy players too come very close too the bush and let rakan go for the Knock up (W) Then xayah empowers her W and ignite the enemy and just AA the enemy (Both rakan and xayah). P.S if they have a soraka i would recommend going for her instead of the adc since there is a chance that soraka can just heal her adc and the adc flashes away. Gj you got your fb and now outfarm the enemy, If this was too complicated for you then, leave a comment if possible (First guide btw).

In team fights your supposed too kill the squishy ones and root the front liners so it makes it easier for your team. Usually i got for the Rakan W + Xayah R + E combo for team fights. If you get that right you can turn ANY team fight! (I recommend using voice chat with your rakan makes things much easier)