The amount of money you can make can vastly vary from thousands of dollars to zero. It depends on factors like course category, quality, reviews, ratings, landing page, need for the course as well as competition.
With all due respect @AnandRajpurohit, a lot depends on you and how you promote your new course to get yourself established here on Udemy. If we do not do the marketing Udemy’s algorithm will not see our course to give it a push along.
Do everything in your power to promote it, get reviews and get noticed.
Good luck and know your work has now really begun.