Choosing a university department and discovering yourself (?

NOTE: The article may have been a little long, but I would appreciate it if you read it. (I wrote some parts just because I felt like it, not every line is very important, you can just read it with your eyes)

NOTE 2: I wrote this article with Google Translate, so there may be logical errors, I apologize.


Hello friends, I am 18 years old, I got into university normally and I am currently in my second year studying mathematics. The reason I chose mathematics was because I liked solving problems during my student life, but I also love biology. I barely studied the 1st grade and decided to drop out of school. Although I am currently registered as a student, I do not go to school and I am preparing for university from scratch (I will study in the Netherlands). None of the options offered as a department make me say "Oh, I would enjoy doing this profession in the future" or "I see myself in this profession." I think it would be more accurate to say that I don't know what I like, I really don't know what my hobbies are, what I enjoy. I don't know myself. What should I do for this? How can I decide which department to choose or how can I find what I like to do? When I look at my social life, there is nothing that I enjoy doing regularly. I played computer games for a long time, but I don't enjoy it anymore. If anyone can help me with this, please write.
Choosing a university department and discovering yourself (?
Post Opinion