Hmm, well writing about things you want to write about, like how you make your videos and what you do in the Gacha community - that's a blog, tbh, and that is what you have right here on Steemit! :)

Now freelancing is when someone else picks the topics for you, or you pick a topic from a list of topics they want people to write about. Then you write the article and you get paid whatever price was agreed upon. For beginners, its usually a penny a word, or less.

I would say, keep trying to increase the size of your audience on here, YouTube and Twitter. Eventually you will be able to make a few dollars for every post you do here on your steemit blog. Other people are doing it, but it does take some time and some promoting to get the word out. But you're doing well here now, and @curie has seen and voted your posts a few times. Keep up the good work and keep making awesome art, and things will happen. :)