I can't begin to count the number of books I am partway through when left to my own motivation. Signing up for a class with a hurdle at the end I need to jump

I can't begin to count the number of books I am partway through when left to my own motivation. Signing up for a class with a hurdle at the end I need to jump over is exactly what I need. Free online classes are like gym memberships, but even cheaper. Most people won't stick to it.