Your best bet is to sample various strains from growers you know and go back to the ones that give you relief. I have rubbed elbows with a lot of growers here is Washington State. Labels of strains are just that, labels.
Growers share genetics, and they get labeled with the growers' forum name, such as "Jimbo's Blueberry" or "Sativa Steve's Granddaddy Purple." Clones are shared, swapped or sold.
Having tried a lot of different strains, I can say that Sativas will make you more sociable, and Indicas will make you a bit sleepy and put you on the couch. Either can be good for pain. Both make you high, there's no getting around that or the munchies.
None gave me relief from ME/CFS, other than a mental vacation. Some strains were good for muscle spasms. Lately though, for muscle spasms, I've found that a particular brand of magnesium supplement took care of them, so I haven't used cannabis for several months.