What are the niche in high demand?

I am considering starting my freelance journey as a translator while having a 9-6 job mon-fri. So I would be working on the weekends with a slow output compared to professionals who work 8 hours a day. My CV is tailored for videogame translation (I wrote my Master's Thesis on the translation of a Russian videogame), but I wanted to know which fields are in demand to see if I needed to tailor my services to a niche in demand that I like. Or even to just know about the market a bit more.

In your experience, what are some good niches? Language pair: RU-IT, though I am planning to add Japanese in the next few years