Hi Eward928,
Thanks for using the Apple Support Communities. If you are unable to shuffle your music during playback, and it keeps just repeating the same song unless you manually select the next song, you may want to make sure that you don't have the Repeat button selected (Shuffle won't work when Repeat is engaged). You may find the information and step outlined in the following article helpful:
Open Now Playing on your iPhone, iPad, iPod touch, or Android phone
When you play music in the Music app on your iPhone, iPad, or iPod touch, or in the Apple Music app on your Android phone, a player appears at the bottom or lower-right corner of the screen.
Tap the player to open the Now Playing screen. From there, you can play a song, control the song's volume, share a song, turn on shuffle, set repeat, and more.
From the Now Playing screen, you can also rewind, pause, or fast forward a song, download the song for offline listening, use AirPlay to stream the song, and more. Swipe up on the Now Playing screen to see even more options.
Shuffle songs
Open the Now Playing screen and scroll down.
Tap to set Music to always shuffle a list of songs selected. Any album, playlist, or set of songs will play in a random order.
When shuffle is on, you'll see . To turn it off, tap the button until you see .
Repeat songs
Open the Now Playing screen and scroll down.
Tap once to turn on repeat for an entire playlist or album. Tap again to turn on repeat for one song. Tap a third time to clear the repeat.
When repeat is on, you'll see or . To turn it off, tap the button until you see .
More options
Under the Shuffle and Repeat buttons on Now Playing, you'll find the song's Lyrics1 and a list of songs that will play Up Next. To reorganize Up Next, drag songs with to rearrange their order, or swipe left to remove a song that you want to skip. If you don't see , turn off repeat.