possability of linux install question

[Linux for blind general discussion]

Hello all,

I've been wanting to try out linux but haven't wanted to give up or mess 
up any of my working windows systems.  Would it be possible to install 
some version of linux on a CD or a DVD; then just boot a computer from 
that disk bypassing windows altogether?  If so, I'd have to make it 
either talk or drive a Braille display.

Wonder if anyone would have any suggestions?  Thank you.

Howard