with regards to "i am currently working with a public listed company as an editor. if im not mistaken, i have to resign if i hold a position as a director in another company, right?"

This will be depending the terms & conditions of your current company. usually you would need to declare this to your HR and HR would advise accordingly. If it's different industries, then there wouldn't be any conflict of interest for you to resign.

As a director / member of the board, you can ask for the board's policy manual to learn what is the scope of the role, etc. it may also have a reference on the director's remuneration (which is how much you may get paid for your services).