Udacity -

If you decide to enroll, do not just "watch videos." Follow this protocol:

Unlike Coursera (which partners with universities) or edX (a non-profit), Udacity operates as a corporate-to-learner pipeline. Its primary value proposition is brutal efficiency: You don’t need four years; you need four months. Udacity

Udacity’s course catalog is narrow but deep. It does not offer courses on history, literature, or graphic design. Instead, it focuses exclusively on high-demand, high-paying tech skills. If you decide to enroll, do not just "watch videos