Newbie Rum Question

Brand new to rum. Typically a wine drinker, but I’ve found recently (hello 40s and perimenopause) that it doesn’t sit well with me the next day, aside from the wrecked sleep. On a whim, I grabbed a nip Blue Chair coconut rum and damn did they taste smooth! Be patient with my ignorant questions… what grade rum is this considered. Low.. Mid.. Top shelf? Is it additive free? Has anyone found that is is a good option for those sensitive to headaches? What to mix with, or how to drink rum? Is there another you would suggest, if I was to invest in a bottle? For what it’s worth, I do love coconut flavor.