I would recommend looking in the engine bay, near the shifter cables to be exact. Make sure nothing is there blocking the cables from moving fully. Next option I can think of is maybe your CMC/Slave cylinders are starting to go, or your cables are stretched. I would recommend starting with the cmc and slave cylinder though as those control the fluid moving from the clutch pedal to the clutch engagement/disengagement and if the fluid is delayed it could mean that the clutch is not fully disengaging, hence the resistance pushing it in gear. Before you replace those I would recommend draining the clutch fluid and replacing with new brake fluid and bleeding them. This honestly could just be the root of the problem