The melody of Telescope by Lennon Stella and Maisy Stella runs 393 notes across 75 bars, 2:55 long in Gm at 240 beats per minute. The tab sits low on the neck, mostly under the fourth fret, one note at a time — no chords to barre and no strumming pattern to keep up with. A piano backing track plays the chords and bass underneath, so the line you are learning sounds like the record even at half speed.
Prefer to strum and sing it instead? Telescope chords and lyrics.