Fizz is a fairly hard champ to play after the rework but he is the one shot king. If you want to know how to play him there is a few ways you have to do his combo. His combo will get you hurt in the beginning of the game.

This is at lvl 2 combo use an auto back off then e him w then run off. Lvl 3 you want to do an all in q him e then w back off if he is low stay on him use ignite if you have to then easy first blood. At lvl 6 there is 2 combo you can do. one is r them then e then wq combo or there is the r q e w combo that you can do. when you get hour glass you can use it in middle of his e.

Pros
*Strong all game
*1 shot all the squishy
*takes out the adc of the fights
*low cd
*high damage
*Fun champ to play
*All way roam after six unless you lost lane
Cons
*Listening to the other team cry about how you pooped on there mid laner.

Use your w for all your farming need. poke them with your stick wait for ew's passive to show all the way then w for death and get its reset for it.