Accessibility is often discussed as a checklist at the end of a project. I find it more helpful to treat it as part of the original communication problem.
Can someone understand a heading without seeing the visual layout? Can they complete an exercise with a keyboard? Does feedback describe what happened rather than rely only on color? Can a person pause motion and still get the same information? These choices improve the experience for many visitors, including people using a phone in a difficult environment.
The same thinking applies to training materials. A short explanation, descriptive labels and a predictable sequence make the task easier for everyone to follow. Accessibility does not remove personality; it asks design to carry its message clearly.
When building an interactive example, I test the flow without a mouse and without animation. If the meaning disappears, the design needs another pass.