Science is observable, measurable, testable and repeatable. If something isn’t observable, measurable, testable and repeatable then it isn’t science but theoretical science or pseudo science..
-Roberto Reeves

Is the Earth a ball?

There has been NO scientific tests performed in the 21st century that has detected curvature or motion of the earth.

What about the pictures from space?

NASA admits openly they compose 'Images' not pictures. These are Computer Generated Images (CGI).
ALL of them.

Where is the edge, why are there no pictures, wouldn't you fall off?

There are no pictures of the edge of our atmosphere and space in the current accepted heliocentric model.
An edge needs proven before it is said to exist.