Plat 3 mid main, need help to improvw

Im a midlane main who started off the season from silver 5 and have managed to climb to plat 3. From my climb to plat, it was reasonably quick, but in plat while i have been climbing it has been slower than the rest. I wanna be able to improve my game and pick up on some of my weak points, if theres anyone out there who could possibly help me or be willing to assist me to become a better player, it would be much appreciated, thanks :).
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