Nice coffee shops within walking distance include Momo Café, Chattahoochee Coffee Co., Capital Commons, Dancing Goats Midtown, like 5 different Starbucks locations, Carbiou Midtown, Café Lucia, Land of a Thousand Hills, Urban Grind (bonus for being black-owned/woman-led). I've studied and hung out at these places pre-pandemic, not sure what the situations are like currently. Coda has a nice food court and place to hang/chill.
Momonoki is my go-to :). Right next to NCR, so very walk-able.