Hi @AndreeiVasi, welcome to the community.
Udemy is an open and truly global marketplace where you can purchase and host online courses, with students and instructors in 190 countries and courses in over 50 languages. It is totally fine that you are from Romania - you're welcome to publish your course on the platform following these steps.
I recommend reading the following article to learn more: Teaching on Udemy: FAQ. If you need further assistance, feel free to reach out to our Instructor Support team here, they'll be happy to help.
All the best! 🙂