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.
Coursera