Barker marked his debut with a wonder goal in their 5-2 defeat by Ipswich on Saturday.
“I've been on the bench maybe nine or 10 times this season and its been frustrating not to play, but their team is full of world class players so it's hard to break in," said Barker of City.
The winger also revealed that the loan move, which is for an initial two months, came as a bit of a whirlwind.
“I first heard about the attention the day before the Ipswich game.
“Someone from Manchester City came up and spoke to me about it and I was really interested straight away."