Best Buy locations are currently training employees
Good news if you have no other options, but I think I'd probably visit my local nerd shop that'd been doing it awhile before I'd go to Best Buy. (But I live in a giant Megalopolis with dozens of repair options.)
I'm very excited about this - Apple has such a polished customer care experience where you can walk into any Apple Store that Google hasn't matched. Increasing the options for in-store repair from just Asurion/uBreakiFix to more stores is big for my peace of mind.