Don't delete the game yet, download the new version,then after that install the game,your phone will ask something like "do you want to update this app" and you should choose yes,this way your save won't be deleted
Don't worry man your English is good I understood perfectly, it's not my first language either I moved to the U.S like 4 years ago, the language just eventually sticks with you lmao. Thanks for the help!