Hi there! Some recommendations to prevent acid reflux are to stay sitting upright for 30-60 minutes after eating and try to avoid going to bed immediately after eating a meal. You can also try avoiding greasy and spicy foods, red sauces and red wines can induce acid reflux for some individuals as well. Over the counter treatment options you could try could be Omeprazole, Famotidine, or TUMS and take as directed. Ultimately the goal is to identify what your trigger(s) are and avoid those as you're able.

Hey there! Some basic changes you can work on implementing to improve your heart health include exercising 30 minutes/5 days a week, altering your diet by reducing foods high in sodium, eating a well-balanced diet, and weight monitoring. The American Heart Association has many great recommendations and tips as well:
https://www.heart.org/en/healthy-living/fitness/fitness-basics/aha-recs-for-physical-activity-in-adults
Just remember, don't overwhelm yourself by making drastic changes all at once, set obtainable goals and work diligently, then continue increasing your goals. You got this!