You can always look at different site / group making professional translation (I know for exemple DLsite is recruiting - but you need to live in Japan; Kagura is recruiting as well or at least, you can contact them for a job through a form to fill on their site).
The other way is what many have done - built a patreon / blog with your work, advertise your work and offer to take job. If you're lucky, you'll attract attention and get offer for "fan translation", dev maker....
But like all line of work, there no sure method.