The melody of I Know You By Heart by Eva Cassidy runs 175 notes across 43 bars, 3:14 long in Db at 88 beats per minute. The tab sits almost entirely in the first two frets, 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? I Know You By Heart chords and lyrics.