Hi William,
Great to hear you want to help work on accessibility! I don't think there's any Fedora-specific work to be done; all the accessibility code lives upstream in the GNOME project. I suspect the GNOME accessibility team could really use more hands. You might want to join these mailing lists instead:
https://mail.gnome.org/mailman/listinfo/gnome-accessibility-devel https://mail.gnome.org/mailman/listinfo/gnome-accessibility-list
Hope that helps,
Michael