@moso11
Which oil u r using? Brand? Viscosity? 1500 Km is much less mileage. At least quality oil should last 3,000 Km
Stiffness of accelerator, clutch and gear shifting stick seems minor issues.
For accelerator, brake & clutch pedals, you can go to any mechanic and get them loose/tight as per your need because every driver is "used to" of certain like i personally like tight/stiff accelerator, brake and specially clutch pedals to get better control
For Gear stick stiffness, change your gear oil with flushing of gear immediately and check difference