I got into southern BBQ about ten years ago. I started with a $45 ECB (El Cheapo Brinkman). I followed the advice of Meathead at https://amazingribs.com/.
It ruined me. I can no longer order ribs at Chili’s Texas Roadhouse, etc. They serve flavorless, soggy steamed pork slathered with sugar sauce.
I recommend Meathead’s Last Meal Ribs.
https://amazingribs.com/best-barbecue-ribs-recipe/
Hint: if you make the Memphis Dust dry rub, omit the rosemary.