Nothing to it!
It is very easy! Look, anybody can do it! Nothing to it! Changing a lightbulb is easy. Nothing to it!
(There's) nothing to it!
1. Inf. It is easy! John: Is it hard to learn to fly a small plane? Sue: There's nothing to it! Bill: Me? I can't dive off a board that high! I can hardly dive off the side of the pool! Bob: Aw, come on! Nothing to it!
2. Inf. The rumor you heard is not true. Pay no attention to all that talk. There's nothing to it.