If you have stomach or acid reflux issues due to coffee but want to still feel the effects, you should absolutely look into low acid brewing techniques, you'll find that cold brew / toddy style brewing is much less harsh on your stomach and can be purchased at most coffee shops, at a grocery, or created at home with a super simple glass jar and a simple paper or cloth filter and time.

Toddy / cold brew is not the same as iced coffee (iced coffee does not have the low-acid properties that toddy / cold brew does. There are also different types of beans and a dark roast is lower acidity.

Finally, if that still doesn't work, switch to matcha. You can get culinary grade from ippodo rather than the finest grade and it's the same quality.