Visualising vocal weight?

Hiya all!

I've recently dove head-first into voice training after attending a introductory session online that went over the very basics. I've since found a bunch of videos (thanks TransVoiceLessons) which are helping me grasp the various features of voice feminisation, although vocal weight is still very nebulous to me in terms of hearing it in my own voice and replicating it.

Are there any good apps online to better visualise vocal weight in recordings, among other vocal features? Failing that, how can I recognise it by sight rather than sound or sensation in other apps? I do already use AmPitch which has helped slightly but I'm still completely lost as to what I'm trying to work towards :P

Any help at all would mean the absolute world to me, thanks! :D