Are there any effective ways to bridge the gap between textbook Bengali and 'Ghotir' vs 'Bangali' regional variants?

I’m a heritage learner, but my family speaks a dialect that sounds nothing like the standard Bengali I see in my grammar books. I want to sound natural when talking to my grandmother, but I keep mixing up the regional pronouns and vocabulary. Does anyone have advice on how to balance learning standard Bengali for 'official' use while honoring the specific dialect I grew up hearing at home?