'Auld Lang Syne' is a traditional Scottish tune, sung at Christmas and New Year.
I have written this version in the key of F Major. As you can see from the key signature, there is a flat sign placed on the 'B' line, on the treble and bass staves.
This tells us that when we see the note 'B' written, we must play B flat instead.
Luckily, there are no 'B' notes in the treble staff (right hand) but there are some on the bass staff, in the chords you have learned previously.
Practice playing each hand separately, before attempting it with both hands, and watch the video carefully, to see how to play the notes in the 8th and 16th bars.