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

Against All Odds

Phil Collins Pop

"Against All Odds" is a song by Phil Collins, originally performed in the key of C major. It was released in 1984 as the main theme for the film of the same name. Phil Collins, also the composer of the song, co-wrote it with producer and songwriter, Daryl Stuermer. Interestingly, "Against All Odds" won the Grammy Award for Best Pop Vocal Performance in 1985. The song's melody is characterized by Collins' signature emotional and soulful vocals, accompanied by piano and soft rock instrumentation.