Graphic design is unusual among in-demand skills in that genuinely excellent free content exists in abundance — which raises a real question about when paying for a structured course adds anything.
What free content is genuinely good at
Learning specific software techniques (a particular Photoshop effect, an Illustrator workflow) is well-served by free tutorials, because that kind of content is easy to teach in a short, standalone video and there's enormous supply of it, often from working professionals.
Where free content usually falls short
Design theory and judgment — typography choices, color theory, composition, understanding a creative brief — is harder to learn from disconnected free tutorials, because it requires a structured, cumulative curriculum rather than isolated tips. This is where a paid, structured course tends to earn its cost.
The real cost of "free"
Free tutorials also cost real time spent evaluating quality and stitching together a coherent curriculum yourself — a paid course's actual value proposition is often that sequencing and quality control, not access to information you couldn't otherwise find.
A practical approach
Use free resources for tool-specific skills as needed, but invest in one paid, structured course specifically for design fundamentals and theory — that's the part genuinely worth paying to have organized well, and it's the part that most differentiates competent design work from work that merely uses the software correctly.
Courses mentioned in this post
Coursera
Graphic Design
California Institute of the Arts · MOOC / Non-credit
Easy Learn Graphic Design for Beginners
Udemy · MOOC / Non-credit
Adobe Illustrator CC - Print Design for Beginners
Udemy · MOOC / Non-credit
Every Adobe Illustrator Effect Explained
Udemy · MOOC / Non-credit