as a bi person who wrote a large part of that aff, I approve of you running the aff. It's not about being queer, it's about fighting against the oppression of queer people. Also, queer theorists today use the concept of queer to describe other oppressed peoples such as POC, womyn, and the disabled. Read the Mary Nardini Gang evidence about totality. They use the term totality to describe systems of oppression as a whole. This totality attacks queers, immigrants, the economically disadvantaged, every oppressed group. Even though you aren't specifically queer, you can fight back against this broader totality. One of the other authors calls this a matrix of domination I think (I dont want to go find the evidence).
That being said, don't pretend to be queer and don't pretend to fully understand the queer struggle. Understand that life for queers is fundamentally different than life for straits because of the heteronormativity and cissexism in the world, and that queer theory and the queer struggle is shaped by that way of viewing the world.