Download album if I have apple music

Add the album to your iCloud Music Library, by uploading to the Apple servers, but as part of your account. You can”t Share these songs with others obviously. Add the album to your iTunes Library, if you hadn’t done so already. Select the songs of the album in iTunes, right-click (or Control-click), then choose Add to iCloud Music Library from the contextual menu.

(This should work across all your device, during the time your subscription.)

or

1. Turn off Settings﹥Music﹥iCloud Music Library on your iOS device.
2. Sync just the non-Apple-Music album(s) that you want synced through iTunes on your computer. (You don’t want duplicates!)
3. Turn on Settings﹥Music﹥iCloud Music Library on your iOS device.
4. A pop-up dialog box will appear asking if you want to keep your music, or delete and replace. You’ll want to choose the keep music option.

(This process will need to be repeated every time you want to update the music you've synced from iTunes on your computer, and for every device.)