You can import you photo or use the AI generator to get your image like I did.  After you get you picture you then can start using the vector tool on the left to start.  It will take time and patience to do this, you can also use the outlining tool and the tracing tool to help you cheat.  As your going through start labeling and selecting colors to separate your vectors at the end you will be able to change the color detail of your image at will.  Inside I also have a copy of my original skull thats is invisible.   

In the file you can change the settings to your liking 

Enjoy:)