Superfluid Helium has in recent years been demonstrated to be a very good platform to realize quantum optomechanics owing to its extremely low losses, both optical (it combines a 19eV bandgap with a near total absence of chemical or structural defects) and mechanical (it has zero viscosity. Moreover, it offers access to the qualitatively novel and unexplored regime of fluid quantum optomechanics. Building on our previous work with super fluid-Helium filled fiber cavities, which couple an acoustic mode of the Helium to an optical mode of the cavity, we report here the first results on photon-phonon counting in such a device using a scheme modified and adapted from R. Riedinger et. al., Nature 530, 313 (2016). We further report progress toward the conditional preparation and detection of a non-Gaussian single-phonon Fock state of this superfluid resonator.