This comp follows a simple ranged AD carry formula that we've seen set after set. Jhin doesn't have much competition in the 4-cost carry department, so he's a strong option for playing a fairly consistent and well known style.
This comp doesn't use any large vertical trait, so you can play this comp almost any game with any start. Focus on getting good items for Jhin and picking up strong utility units when you find them.
Level up to 4 early if you want to start a win streak. Level up to 5 to try and continue the streak.
If you're weak in the early game, you can opt to save gold and lose streak instead.
At Round 2, level up to 6 regardless of your start. Put together the strongest team you can.
At Round 1, level up to 7. Roll down to stabilize your comp if you are weak. Afterward save up to hit level 8 and complete your comp.
For the Socialite Hex, if the Hex is in the backline, you can put Jhin on there, but if it's in the frontline, you can put Braum on there instead. Ideally Jhin is in the corner for his Sniper trait, so you can be creative and put other units like Miss Fortune or Orianna on there instead (this will also work if the Hex is in the middle rows of the board).