With 10 years of CorelDRAW experience, your daughter already has a significant head start. The principles of vector drawing, paths, nodes, Bézier curves, typography and colour management are largely the same. It's really a case of learning where Illustrator puts things and how it approaches certain tasks.
A few things I'd recommend concentrating on initially:
-
Selection Tool (V) and Direct Selection Tool (A) Understanding the difference between selecting objects and editing individual anchor points is fundamental to working efficiently in Illustrator.
-
Pathfinder and Shape Builder (Shift+M) These cover many of the operations she'd know as Weld, Trim and Intersect in CorelDRAW.
-
Clipping Masks. Similar in principle to CorelDRAW's PowerClip, although the workflow is different.
-
Layers, Groups and Isolation Mode. Understanding these makes working with complex artwork much easier.
-
Appearance panel: Particularly useful for applying multiple fills, strokes and effects without permanently changing the underlying artwork.
-
Artboards ---> Worth understanding early, especially for documents containing multiple designs or variations.
She can also customise Illustrator's keyboard shortcuts through Edit > Keyboard Shortcuts, which might help with the transition.
I'd recommend taking a few projects she's already completed in CorelDRAW and recreating them in Illustrator. Rather than following generic beginner tutorials, she'll be learning how to achieve results she already understands.
Illustrator also has a Discover panel (Help > Illustrator Help), which lets her search for tools and find tutorials directly within the application.
Adobe's learning resources are worth exploring:
https://helpx.adobe.com/illustrator/tutorials.html
One other consideration: if she needs to bring existing CorelDRAW files across, Illustrator's native CDR support is limited to very old CorelDRAW versions (5–10). Exporting from CorelDRAW to PDF or another compatible vector format may be necessary, but she should check fonts, effects, clipping and transparency carefully after conversion.
The biggest advice I'd give is not to try to make Illustrator behave exactly like CorelDRAW. Some things are more straightforward in CorelDRAW, others in Illustrator. Learning Illustrator's own workflow will ultimately be quicker than constantly trying to replicate the CorelDRAW method.
After 10 years working with vectors, she should find the transition considerably easier than someone starting from scratch.