Generation, transportation and detection of spin in a controlled manner are very important for spintronic applications that deal with transport of spin-polarized electrons. In materials with large spin-orbit coupling (SOC), the spin dependent electronic transport results in the accumulation of spin-up and spin-down electrons across the edges of a conductor. The spin gradient generates a spin current, and the phenomenon is known as spin Hall effect (SHE) analogous to conventional Hall effect arising from deflection of charge carriers in the presence of an applied magnetic field. Similarly, when a spin current traversing through a material can generate a perpendicular charge accumulation which is known as inverse spin Hall effect (ISHE). The combination of SHE and ISHE is required to generate and detect spin current through electrical methods. A magnetic insulator and a paramagnetic metal (large SOC) bilayer is an ideal system to observe the combination of both SHE and ISHE. Depending on magnetization direction of the magnetic insulator, the spin current will get either reflected or absorbed at the interface resulting in a modulation of resistance and is termed as spin Hall magnetoresistance (SMR) which was first reported and widely studied in Y3Fe5O12 (ferromagnetic insulator)/Pt (paramagnetic metal) systems and exhibited the highest spin to charge conversion efficiency. However, the magnetic proximity effect and induced magnetism in Pt metal complicates spin to charge conversion efficiency in this bilayer system with spurious signals arising from magnetic order of normal metal, which dictates over the SMR signals. In this scenario, we have investigated the possibility of using an antiferromagnetic insulator (LaMnO3) and a metallic oxide (SrIrO3) bilayer system in terms of spin transport and interface induced effects. In this 3d-5d oxide interface, we observed a tunable Rashba spin-orbit coupling and spin relaxation mechanism with changing magnetic order of the underlying magnetic insulator (LaMnO3). In addition to this, we have also investigated spin pumping experiments through broadband ferromagnetic resonance in SrIrO3. All the results in spin transport in a quasi-two dimensional electron gas (2DEG) formed in a 3d-5d oxide interface as well as the challenges in spin pumping experiments through a strongly correlated quantum material SrIrO3 will be discussed.