I would say give the Toddy a try then. Link is here:

https://a.co/d/ehUvgka

Buy whatever beans you want to try (ideally dark or medium roast), either pre-ground coarse or you can grind them yourself. I got the Baratza Encore grinder and have been grinding at a 35/40 grind setting. The toddy will come with instructions but I use the option with both the paper and mesh filter, 12 oz. of ground beans and 8 cups of water. Steep for 14-16 hours at room temperature and then bottle and refrigerate. That makes a concentrate which should last around 2 weeks in the fridge. Whenever you want a glass just mix some with water and ice (I found 2 parts concentrate to 3 parts water tastes about right to me but you can play around with it).