I have seen Translation Campaigns that requires you to put your previous works/translations. Is there any chance for a beginner, who doesn't have translations yet, to join this kind of campaigns? If yes, how? Thanks!
I would say, depending on the languages you are good at, find a previously completed translation and do it once again. By doing this you will have a proven work. Show this as a proof and apply for translation campaigns. In case, if they accept, its a luck. Make sure, you do more so they can accept. If it doesnt work, offer as a free translation in the beginning, so you can have some in your bag, before you get paid.