Hi Cherry I will do my best to explain the workings of Echo.
We bought it at John Lewis for about £150.00 worth every penny IMO as I love music.
My son bought us a small add on which means I have a mini Echo in two rooms.
DS linked it up to our Wifi
DS pays about £3.99 a month to Amazon for us to have Unlimited Music. I do not buy any extra music from Amazon it all comes from the £3.99 a month.
This is how it works, very much like talking to a robot.
I say to the Echo cylinder 'Alexa play me music by the Mavericks' she then replies 'Shuffling music by the Mavericks'
I may say 'Alexa repeat the last song' and she does.
'Alexa play 50s music'
Here are other commands 'Alexa volume up/down',
'Alexa what is the weather today?'
'Alexa play me meditation music'
'Alexa play the soundtrack of West Side Story'
'Alexa play Radio 4, radio 2, Jazz FM' so it is a radio as well.
'Alexa put the timer on for 10 minutes'
My 6 and 4 year old GSs give Alexa commands all the time.
It does many more things, but this will do me for now.
All you need is someone to set it up for you.
I love it !