Random Amplitude Generator w/ Ability to Control Avg. Range and Complexity

Hi,

I am trying to create an ability of my patch to randomize amplitude levels and then be able to control the approximate range (should there be a big range of amplitudes or do I want to limit the amplitude to a percentage of its max range 0%-50%, 70%-90% ect.)

Secondly, there should be an ability to control the probability of the amplitude (should the amplitude sway mostly on the low side, high side or be completely random?)

I've started a patch (attached) but its not really what I am describing here, just my beginner thought process.

Thanks so much for any help