I was at a concert right after Lonely Avenue came out where Ben said that this was a song when he and Nick Hornby agreed that the first song needed to acknowledge that Ben did not write the lyrics so the "I can do this really I'm good enough" refers to Nick saying that he can write songs and the line "I just need a break is about Ben not writing his own lyrics on this album.
I was at a concert right after Lonely Avenue came out where Ben said that this was a song when he and Nick Hornby agreed that the first song needed to acknowledge that Ben did not write the lyrics so the "I can do this really I'm good enough" refers to Nick saying that he can write songs and the line "I just need a break is about Ben not writing his own lyrics on this album.