nothing to it, there's
It's not at all difficult, it's easy, as in Of course I can fix the faucet—there's nothing to it. This hyperbolic term was first recorded in 1934.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.