Ed Sheeran writes pop songs that work beautifully on a single acoustic guitar, which is exactly why his catalog is one of the best teaching grounds for a beginner. The chords are open shapes you already know. The progressions repeat. The drama lives in the dynamics and the rhythm, not in technical guitar moves.
The capo is the trick. Sheeran clamps it high up the neck on most of his songs, often at the 4th or even 7th fret, then plays familiar shapes underneath it. Photograph in E sounds difficult until you put a capo on the 4th and play C-G-Am-F. Same with Castle on the Hill. The capo is doing the hard work; your hands stay in beginner territory.
If you only have one Sheeran song under your fingers, make it Perfect. The progression sits in the middle of the easiest chords on the guitar, the tempo gives you space to count the 6/8 feel, and the song is one of the most-requested at any informal music gathering. Once Perfect feels solid, Thinking Out Loud is the natural next step. After that, anything in the catalog is reachable.
The other thing worth borrowing from Sheeran’s playing is the percussive element. He hits the soundboard of the guitar between strums to add a kick-drum sound. You don’t need to do that to play the songs, but watching how he uses it will improve your sense of rhythm faster than any metronome drill.