Grab a pen and paper, Shohei Ohtani -- former Dodgers star Justin Turner has some solid pointers on how the MLB superstar can succeed with his new team ... telling TMZ Sports there's one simple way to win the fanbase over (if he hasn't already).
Turner -- who signed with the Toronto Blue Jays this offseason -- will forever have a special place in the hearts of Dodger Nation ... after all, he was part of the World Series-winning squad in 2020 and also secured the NLCS MVP when they made it to the Fall Classic in 2017.