How to flatten missing fonts when you import a PDF

First create a new document in Illustrator
Go to File -> Place and choose your PDF
Make sure the link box is checked and click Place. 
When the Place dialogue box pops up, click OK.
Go to Object -> Flatten Transparency... 
    Make sure Convert All Text to Outlines is checked and click OK.
Release the clipping mask and move objects around

Copying appearance to another layer

• ​https://www.gameartguppy.com/illustrator-quick-tip-how-to-copy-appearances-between-objects/#:~:text=To%20copy%20the%20Appearance%20of%20the%20third%20path%20to%20the,be%20the%20same%20(3).​

• Stacking appearances: make a graphic style that is just the drop shadow that you want.

  select [object b] and option click that graphic style to apply it without interfering with any other appearance attributes.

Core skills

• Duplicate last action

• Touch type tool

• shape builder tool

• Appearance

• Drawing

  • Blob brush tool

  • Curvature tool

  • Recolor artwork palette

  • Draw inside mode

  • Pencil tool & simplify