While Udemy isn’t the best platform if you want to sell a higher-priced course (most of their courses sell for around $15), it IS a great way to get exposure through their extensive marketplace.
Offer a shorter version of your course on Udemy, and then tell students how they can access your full-length, more in-depth course.
This will give people a way to try out your stuff before they invest in the whole she-bang!