Hi there and
to the forums!
Niamh has given great advice
It's true that Cloudy and Sunshine are still settling in, so their extreme nervousness is normal. It sounds like so far they are settling well, since sometimes you can hear them chirping at each other and they have been eating and drinking
Continue doing what you're doing, reading to them and talking softly. Music is a great idea to help them settle in as well.
After about two weeks of this, they should be a little more comfortable with you
Budgies do need a minimum of 2 weeks to be comfortable with their new homes.
Meanwhile, be sure to read through the "stickies" (threads "stuck" to the top of each subforum for easy reference) and the Budgie Articles to ensure you're up to date on the very best of budgie care practices! If you have any questions afterwards, please be sure to ask as we'd love to help.
Hope to see you around, and Sunshine and Cloudy too!