If you love teaching then man you got many options available. There are pre-made platforms where teachers can enrol and deliver online lectures to the all kinds of subjects they want.  The payment is also enormous based on your skill level and delivery method. Now one of the platform that I know is chegg. This is one of the popular platform with lot of intake since they are global platform. You can try that out with part time job opportunities.

Moreover, if you are not willing to work under anyone then you can simply go for creating your own courses and modules in a recorded digital media. This can be published on various digital platforms with paid subscription or rentals.

If you don’t like that either then you can simply go for live streaming classes or YouTube videos. People are hungry for knowledge, if its free then they would be more than happy to subscribe you. That can generate you handsome amount of money. The ways are many but you need to focus on only one of them.