I think some people just have a loud voice and some have a quiet voice. I reiterate an earlier posting, learn how to use a mike. That's what it's there for.

I personally never observed voice lessons to help with a bad singer. Either you have a good voice or you don't. It's a gift. Maybe I'm wrong, but I have never heard a tone deaf singer improve with lessons.However that's not what your problem is. But I'm not too sure lessons will make a reedy voice 'bellow.'

One thing that lessons may help with tho, is your confidence. Lessons and/or performing more will give you the confidence to free up and sing your heart out.

And that, dear friend, is all the audience should need from you.