Most applications are based on granular superconducting materials. The grains are surrounded by an oxide layer, the site of dissipation. They are coupled together by the Josephson effect, forming a network of Josephson junctions. In these disordered superconductors, disorder, superconductivity and electron localisation coexist. Depending on various parameters including thickness, disorder or magnetic field, a superconducting thin film can undergo a superconducting to insulating transition (SIT), which allows to extract the most relevant characteristic scales of the system. During this internship, we will investigate the effect of strength of inter-grain coupling affects dissipation mechanisms. We will characterize samples of different thicknesses through electrical transport measurements at zero and finite frequencies, in a resonant microwave circuit, under magnetic fields, and in cryogenic conditions. We will study the effect of disorder on the intrinsic characteristic scales of superconducting fluids and extract the effect of inter coupling on the dissipation mechanism. Moreover, we will study the effect of controlled disorder geometry, namely quantum geometry, on the SIT. This strategy will allow us to demonstrate the pair localisation effect in a disordered geometry configuration on the order of the superconducting scales leading to the superconducting to insulating transition.