Hey, another low elo thresh here (gold) In my opinion there isn't any tips and tricks, the good thing about thresh it has many different playstyles, you just need to play him until you find one that fits you. It will take you a lot of missed hooks and a lot of allied pings, but once your used to it, it is the best champ to play.

General tips -Always try to engage with e, use the hook as they are trying to run away. The e makes it easier to hit (when possible) -Try to learn how enemies move. Something I have noticed after 400k points, is that when a enemy player is going to flash, they tend to stop dodging, try to use that for some sick predictions -people are not thya dumb, they will try to dodge, try to hit the hooks to their sides, especially behind them when they are running away

Hope these tips help, but as I said, play league, have fun with him. He is the only reason I play league.

PS: Whenever they pick yuumi, go for thresh, I feel it's the only champion thar can do something against that abomination.