Our Illustrator tutorial is scheduled for February 2.
In the meantime here are a number of tutorials that may be helpful — those in bold are relevant, especially Drawing with the Pen Tool.

To create a repeating pattern and some digital texture, check this guide.
Tutorials
Illustrator List of Tutorials
Basic Shapes
Drawing Shapes
Drawing With the Pen Tool
Layers
Stacking/Grouping
Rotating/Reflecting Objects
Isolation Mode
Pen Tool Game
Pen Tool (Extras)
Other functions/tools we’ll review in class
Pathfinder
Object
Transform: Move, Rotate, Reflect, Scale
Arrange
Group/Ungroup
Lock
Window (Dialog Boxes)
Align
Quick Duplicate (Holding down Option)
Color
Layers
Stroke/fill
Pen Tool
Shape Rectangle (Ellipse, etc.) Tools
Rotate
Scale
Brushes
Shape Builder
Clipping Mask
Pattern Tool
Pattern Brush
Scatter Brush
Art Brush
Live Paint
Art Board Tool
Using Kuler
Saving Swatches