I am an aspiring Fizz One Trick. I've played the fish for 2 years now and I have some things to prove you don't have to be a mechanical genius to play him/have to be good at the game at all. Source(I'm Silver 4 and boast 20 to 30 kills per game with a 62% win rate in ranked.) https://na.op.gg/summoner/userName=bruhwtf

Do you like just not dying? Do you enjoy being able to slip out of any situation? Do you enjoy outplaying the the ever-loving scheisse out of someone only to get "broken champ"'d in chat? Then fizz is the champion for you. He's fairly easy to pick up and fairly easy to do horrible on.

Pros:
Really Fun
Untarget-abilty with E
Lots of burst
A ton of low-hp outplays
Impossible to get ganked with E
A constant game of chicken which whom has the biggest balls wins.

Cons:
Easy to do bad with, fall behind
Takes time learning what to do in a situation
Needs an above average reaction time to perform well
Can be very frustrating at times
Requires confidence and map knowledge to roam/river fight

Start your e and buy corrupting pot with yellow trinket.

Ward top side pixel brush at 1:20

Get the first three melee minions with your e and then sit behind your wave to avoid as much poke as possible, it is okay to give up cs before level 3. You ARE NOT a champion before level 3. So try your hardest to not loose all your hp before reaching champion status.

Go in for short trades. There aren't really any correct fizz combos, you just learn what to do in a situation with time. Like maybe you can q to close the distance, long duration e someone to slow them down and just walk them down with empowered autos (w) for a confirmed kill. Fizz is a reactive champion. Using the same combo every time will not work.

Fizz is a sucker for river fights, early game jungle skirmishes with your jungle. Around scuttle crab timer (3:20) you want to be looking at the riverside your jungler is on. If it looks winnable or you think you could get anything out of it. Balls to the wall send that mofo.

DRAGONS AND HERALDS AND BARONS: If you can try to get to objectives about 25-30 seconds early and position yourself where you would be able to flank the ADC/support. Your goal is to let the jungle have the best possible 1v1 they can have while you rain hell on the squishy bot lane.

Janitor Fizz: When a fight is lost and there is a pesky enemy team with low (enough)
hp overextending, make then remember you are in the game. If you see a fight about to start, or an enemy jungle ganking the bot or top lane, shove your wave and go to the chaos as soon as possible to clean up and reduce the lost value of your team by cleaning up the fight. IT IS IMPORTANT TO NOTE TO NOT TRADE WITH YOUR LANER BEFORE LEAVING YOUR LANE TO HAVE AS MUCH HP FOR WHAT'S GOING TO ENSUE ELSEWHERE.