Adjust/personalize auto-correction on Android

Using a Moto G Play with Android 7.1.1 installed. Whenever I type the word ie. (that is), this is auto-corrected to one of: or. IE. The auto-correction selected appears to be random (perhaps based on context). I would like to tell my phone to NOT auto-correct ie under any circumstances. If I meant to type or and accidentally typed ie...that one is on me! Is there any way to adjust auto-correction by manually entering personalised phrases (such as into a dictionary)? I don't want to turn auto-correct off entirely.