You can use Udemy for free and simple ways to create an online course with the knowledge you want to share. It's best for trying out course creation and learning the process. Making as well as selling a course without having to build a multi-channel platform.
Udemy is a marketplace Teachable alternative that you should have on your radar. Their platform offers more than 130,000 courses every month and they’ve built software that allows creators and entrepreneurs to automate their courses easily. Because of this, Udemy is becoming a popular Teachable alternative for entrepreneurs and people working in tech-related fields.