Lynda - Illustrator 2021 Quick Start

https://www.lynda.com/Illustrator-tutorials/Illustrator-2021-Quick-Start/2874013-2.html
Get started with Adobe Illustrator over your lunch break. In this short introductory course, instructor Kladi Vergine covers the bare basics of how to use Illustrator. Kladi shows you how to create and set up a new document and how to set up your artboards. She goes over the tools you use to draw lines and curves, then transform, duplicate, and group your lines and curves. She explains how to create strokes with variable width and transform your outline paths into shapes. Kladi walks you through how to use the Ellipse tool, the Rectangle tool, and the Pencil tool to speed up and ease your creative process. She shows you how to use the Color Themes panel and apply gradients to your work. Kladi discusses how to insert and edit text in your artboards, as well as how to create and edit Layers and how to duplicate your artboards. She teaches you how to use the Recolor tool to your advantage, then concludes with how to export your work.

Lynda - Creating Icons with Illustrator

https://www.lynda.com/course-tutorials/Creating-Icons-Illustrator/2864298-2.html
This course provides an overview of what an icon is and its key characteristics, then teaches you how to design your own icons using Adobe Illustrator. Instructor Bart Van de Wiele explores why you need icons, how you use them, and why scalability is important. Bart steps you through how to set up your Illustrator document before you begin your design process. He describes how to organize your work using Illustrator artboards for arranging, naming, and exporting your icons. Bart walks you through ways to import your sketch into Illustrator, then goes over how to clean up your sketch digitally. He shows you how to use simple, complex, and compound shapes to build your logo digitally, then explores several more advanced techniques. In conclusion, Bart covers best practices for exporting your icons for the web, for print, and for use in other applications like Photoshop.