Voice recording


I am a person with big time problem with voice, and this is one of the major aspects I was looking forward to get help with. I talk minimal, very softly that I often have to repeat (usually blushing at my own shyness). Being in a profession where the norm is self confidence and leadership, this becomes even more noticeable and embarrassing.
So I am ready to do all that takes to make it better.
When I do the voice recordings and listen to them, should I be trying to increase my volume to desired level? Is this to be done gradually?
I have difficulty increasing my volume even when I am on my own that I sometimes wonder if it is just my anxiety or a problem with my voice box itself.
Any other suggestions to improve voice in addition to voice recording and listening.1