Hi, Marcos. I'm not who you're looking for, but can I offer a suggestion?
It might help someone decide if you could be the partner for them if you noted your specific interests, your experience, what you consider your strengths, and if you're really brave, your weaknesses, too.
Different people will reply if you're interested in epic fantasy, have a world all created, and need someone to share the writing tasks than if you want to swap chapters of science fiction novellas with another writer who's only just beginning to explore his interest and skill levels.
Honesty and openness can help you get exactly what you want, in most things.
Maryn, usually honest and open