AMC+ Without Cable
Yes you can! You can subscribe directly with AMC at amcplus.com/create.
If you prefer, you can download the AMC+ app on the device of your choice and start your subscription there. In that case, you will be billed through the app store for that device (Apple App Store, Google Play, etc).
AMC+ is also available via Apple TV Channels, Amazon Prime Video Channels, and The Roku Channel.