This explains how to change brightness of vector in illustrator by using recolor artwork
How to adjust brightness of vector drawings in illustrator
How to extract colors from an image in illustrator
Learn how to create color palette in illustrator from a photo. There are mainly two ways to extract colors.
How to use arc tool in illustrator
This article explains how to use the arc tool in illustrator. The two ways to draw precise circular arc is explained. The full circle is drawn using the arc tool as an example.
How to remove drawings outside of an artboard in illustrator?
This explains how to delete objects outside the Illustrator artboard. Also, the export methods of your vector drawing are shown. You can export your file as a raster image or vector file using these methods.