Three Little birds- be able to play changes without stopping. Start with one strum per bar. Move on to 2 and when those are comfortable try playing with 4 strums per bar without pausing, without hesitation.
12 bar blues- practice slowly keep in mind common fingers between chords. Be able to play slowly without hesitation or pauses
D Major scale- second position. Keep LH thumb behind the second finger. Keep fingers down as you go up the scale. Use tips of fingers. Play with 4 plucks per note or Mississippi hotdog.
Amazing grace - be able to play first half from memory count out the beats as you play hold half notes for their full value