When you first press, there will be little or no feel of resistance. When you do feel some resistance, that is when you are at the point where enough added pressure will release the shutter.
Do you ever see the display light up in the viewfinder? It only takes a very slight depression of the shutter release to light up the display. If you are not seeing it, it is possible you are pushing harder than you need to.
If you are not seeing the display, try moving your eye as close as possible as you look into the viewfinder while changing your viewpoint slightly higher and lower as you look through and lightly press the shutter release. The display will only be visible when your eye is at the right height in a rather narrow range up and down as you look in the viewfinder.
If you wear glasses, take them off to make it easier to get closer until you know where to look for the display.