Thank you for posting here in Apple Support Communities, landy196.
We understand that you're experiencing some issues using Apple Music with Alexa, as well as the Bluetooth feature on your iPhone. You've come to the right place, we'd be happy to help. To get started, we ask that you check out the information within the following resources:
Play Apple Music with Alexa - Apple Support
If you can't connect a Bluetooth accessory to your iPhone, iPad, or iPod touch - Apple Support
Please be sure to perform each step outlined within those resources, and keep us posted on the results.
Cheers!