For an advanced riff I think this is very learnable - but ONLY if you follow the tips in this video!
Here we take a look at Message In A Bottle by The Police - played on guitar by Andy Summers. Use a chorus pedal to get the sound of the original recording!
This riff is composed of 9th chords, which are a tough stretch. BUT (and it's a big BUT) - you don't need to do the stretch to play the riff well! It can be more beneficial to instead work on finger speed. Watch the video, try it yourself and let me know how it goes!