Personally, I think writing is a great thing to get into. It's fun and it really builds up inner confidence. I'll tell you this, no one really starts out good. That's a known fact, especially if you're younger, the fanfictions you write may not always be good- but you can only get better with time, practice and inspiration.

Do something that makes you happy, and I am sure that you will bring happiness to the people who read your work. It is very enjoyable to look back at comments on your stories and see real people who actually like reading what you put out.

Just have fun with it and write whatever you want~

Of course! I started like 6 months ago and now I have 1000+ unique subscribers! You should so go for it! It's fun reading comments and getting subscribers, you'll love it! :D