Its easy less than 30 minutes and under 30 00 in parts.
Install gutter downpipe.
Gutters over flows add downspout to bring water down from roof faster.
Drill a hole in the bottom of the gutter at the 4 inch mark with a 1 inch hole saw attachment to the drill.
You can double check the fall with your spirit level.
Cut it to length with a hacksaw and removing any burrs with a half round file.
Place a step ladder under the area you are installing the downspout.
Watch and learn how and stop.