NASHVILLE —  Lainey Wilson’s very first paying out gig as a singer was the grand opening of a ease keep in her very small hometown of Baskin, La. She was 9 decades aged, and the work paid 20 bucks. “My daddy took me up there — no guitar, no microphone, no absolutely nothing — and I just sang a cappella,” Wilson, now a country star with a pair of No. 1 radio hits to her title, recalls in her thick Louisiana accent. Later on she’d sing in the aisles of Walmart soon after her moms and dads would end fellow consumers to demonstrate off their gifted daughter with the preternaturally soulful…