Udemy

Udemy works as a marketplace where independent instructors publish courses on nearly any subject you can think of. Most courses are paid, but Udemy runs frequent promotions that slash prices from $80 or $100 down to $10 or $15, making quality courses genuinely affordable. You keep lifetime access to what you buy, so there's no rush or expiration.

The variety is Udemy's strength, with courses on technical skills, creative pursuits, business, personal development, and hobbies. Quality varies instructor to instructor, but reading reviews and checking course structure before buying helps you find solid teachers in your area of interest.