University of Maryland has a neat one page with the six essential steps for accessible online content. None of it is rocket science or geeky. This ready reference just has reminders to be a bit more thoughtful about how you go about it. The aim of the six steps is to give everyone equal access to information and services. It’s simple things such as colour contrast, alt-text for pictures, and appropriately placed links to other pages – not “click here”, for example. It’s a handy reference to print out and pin up at your desk. Good for designing online-learning and adding content to an organisation’s website.
There is more on the University IT Division website. https://itaccessibility.umd.edu/