Hi and welcome ..
You can order up your
hosting now using your current domain name that you have with yahoo. Once you receive your hosting account you can then request the
free domain transfer to voda hosting. You will receive a few emails from voda host, you will mainly be looking for and wanting to save the email entitled "log in information" .. this will provide you with the username and passwords necessary for you to access your control panel and publishing from the website builder itself.
Blue Voda is the popular website builder with many awesome website building tools to customize your website in whatever fashion you like. Soholaunch is mainly used as a shopping cart website and you are restricted in your design in comparison with Blue Voda.