I just finished learning Samson by Regina Spektor. I need ideas of a pretty song to learn, preferably contemporary, but it doesn’t have to be. Sheet music too please

I have been playing guitar for about 2 years now, I am going to do Certificate 3 in Music at TAFE. I have to perform 2 songs and some basic music skills for the audition. I was wondering; how long does it take you to learn a song on average? How much do you play the song? What do you do to practice? Guitar Pro/Guitar Tab software, play along with the track, read tab? Slow down tracks?

If i really applied myself could i learn how to play a song as simple as Hey there delilah in about 2 months?
thats just an example, i would like to learn to play rock and pop music on it