I started to fiddle around with a cheap entertainer keyboard without any velocity sensitivity.
Later I realized I need a more elaborated keyboard to control my digital audio workstation (DAW) and I've upgraded it to a midi keyboard which as a bonus has velocity sensitivity but absolutely now weighted keys (so no graded hammer action :/ )

Even this change is of course dramatic as I am unable to maintain a steady velocity. 
As I need to be able to maintain a velocity I am looking for proper ways to do that. In addition to standard finger strength training for piano players I am also making use of DAW.

The velocity of the keyboard is mapped to the range of 19-127, I think 80 would be the "standard" velocity.

Now wit the ability of the DAW I did the following: I silenced any velocity below 75 and changed the note to something awkward for velocities above 85.
With this I can only hear proper notes when I hit the correct velocity. This of course drives me nuts at the beginning as hitting the right velocity with my weak fingers or the weak hand is hard. 

Why I am seeking advice is, I don't know where this is the right approach. Is this regarded as a good approach from somebody with experience in piano playing? (Beside the fact that it will give me a hard time whenever I should switch to graded hammer action instrument)

Is my restricting to harsh or to broad?
Can I use other known features to enhance this training or should I abandon it?

(I am aware that I am not going to be a concert piano player, I just like composing things)