So I did try to DIY ...very very difficult that I give up doing it. Better let the mechanic to do it with the proper tool.
It took them close to 3 hours to change this door handle...worth paying to do it. Same time I send my Matrix for manual gearbox oil change..yeah kill 2 birds with one stone.
The door handle is not original, it's OEM and it fit in nicely...RM45.