The Debian Project welcomes and encourages participation by everyone.
No matter how you identify yourself or how others perceive you: we welcome you. We welcome contributions from everyone as long as they interact constructively with our community.
While much of the work for our project is technical in nature, we value and encourage contributions from those with expertise in other areas, and welcome them into our community.
The Debian Diversity Statement has recently turned 5 years old, and I still find it the best diversity statement I know of, one of the most welcoming texts I've seen, and the result of one of the best project-wide mailing list discussions I can remember.