Hello and welcome to the forum!

You asked the question backwards, I believe.
Start with what you know to do and think about the skills you have that would be useful to others. For example, say you're a programmer, you can offer your expertise in programming, but maybe you also know web-design and graphic design. Maybe you have a knowledge of journalism and the online publishing process. You can serve as an editor or copywriter for content on the site. Or maybe you’re great at marketing, so you can do social media management, or lead email marketing campaigns.

If you really want to work, you need to evaluate what your interests are and what would be valuable to other people, and then go out and get the skills to develop that knowledge and expertise.