How to play this song ?

These are single notes, not chords.
Each note must be played individually.

There are different notations, like, A B C , DO RE MI , Sa Re Ga and numeric notation 1 2 3.
Choose one that fits better for you.

You can distinguish the octave by the color of the note and if it is UPPERCASE (high pitch) or lowercase (low pitch). Enjoy

Impossible

James Arthur Pop

"Impossible" is a song performed by James Arthur, an English singer and songwriter. First released in 2012, it became popular when Arthur won the ninth season of the British music competition show, The X Factor. The song was originally written by Arnthor Birgisson, Ina Wroldsen, and Steve Mac. Notably, it is a cover version of the song by Barbadian singer Shontelle. "Impossible" is a heartfelt ballad with a captivating melody that showcases Arthur's soulful vocals.