At age 14 he travels each year between New Orleans, where his mother lives and Nashville, where his father lives. He spends one school year at each location. As long as he keeps his grades up, he is allowed to hit the streets to drum on the sidewalk in order to make money.
As for the drumming, he taught himself his techniques, which are spectacular.
He said that his dad had a bunch of buckets laying around the house, because his dad was a panhandler, and he got the idea to use them as drums.
Talent would be an understatement.
"I taught myself how to play the guitar, I taught myself how to play the drums, and I kind of fake doing both of them. But drumming comes more natural to me, and it just feels better." - Dave Grohl, Nirvana and later the Foo Fighters