What should I do?

Did you ever had this feeling that you are too influenced by books or tv/"netflix" shows ?
Well, since High School, mostly, I have this thoughts of "what I should be". When young I wanted to be a veterinarian, and I continued with this dream for a long time, until the second year of my high school. During my second year at HS a lot of things happened, including the death of my mother. I know, it is horrible, I miss her so much, but this is not the main reason of this post, it is a part of it, but not all of it. In short words, she had cancer. Of course it affected me and my family a lot.
Anyway, during my second year and my third and last year in HS (in Brazil, where I live, it is only 3 years of HS) I started rethinking the career I wanted for me. What calls my attention now is that most of my options where inspired by books or tv shows that I liked.
For example, there was a period of time that I wanted to be a fashion designer, mostly because I loved some clothes from Gossip Girl and I had some books of girls that liked these things. I also wanted to be a veterinarian because I always loved animals. I wanted to be a medical doctor because it was something that me and my mom talked about even before she was sick, we loved to watch births and surgeries on YouTube ( maybe it sounds strange for you if you are not into these things, but if you like Greys Anatomy, you probably understand me ). There were times I wanted to be a secretary because I like to write, organize and take notes.
This list goes through many careers. Still I don't know "what I should be". Now I am with this "inspiration" to write a book or something. Why? Because I am watching this Netflix show where the girl is a writer, so it is awakening this creative-writing-side of me.
I learned in my 22 years of life that I can be whatever I want and how many things I want (as long as I have time for my family). I am still wanting to be a medical doctor. When it will happen? I don't really know, so many things has changed since I graduated from HS, and I am sure a lot will change until I am able to realize this dream. But for now I will at least try to write this book (maybe it will not be a book, who knows?), it may not work but if it works, it will make me happy. Also, it will be a good thing for me to write more in English.
If you have ideas for me, if I wrote something wrong, or if you want to help me to write better ( my boyfriend says I don't know how to use commas, I think it works differently in English) just leave a commentary below.
Thank you!