2005 Hyundai Accent P2096 and P0137 O2 Sensor Fault: Loss of Power and Misfire Symptoms

I recently encountered several diagnostic trouble codes on my 2005 Hyundai Accent 4-door. I'm relatively new to car diagnostics, so I'm seeking advice on what these codes mean and how to address them. The vehicle exhibits noticeable power loss when accelerating aggressively—especially after shifting gears—and struggles with acceleration in second or third gear, particularly when the AC is running. The power seems to return only once RPMs increase slightly. The specific trouble codes are: - P2096: Post-Catalyst Fuel Trim System Too Lean Bank 1 — indicates the fuel mixture after the catalytic converter is too lean (not enough fuel). - P0300: Random Misfire Detected — suggests inconsistent combustion in one or more cylinders. - P0137: O2 Sensor Circuit Low Voltage Bank 1 Sensor 2 — points to a faulty oxygen sensor reading in bank 1, sensor 2, which may affect air-fuel ratio control. I'm looking for guidance on possible causes and solutions. Could these codes be related to the power loss I'm experiencing? Are there any recommended diagnostic steps or parts to check?