The former Bolton Wanderers striker moved to Turf Moor yesterday.
"I'd say at the time of the move to Bolton the fee did weigh a little heavily on my shoulders," said the 23-year-old, who has signed a three-year deal at Turf Moor after spending last season on loan at Charlton.
"I was only 20 years of age and it felt like there was a bit of pressure on me.
"I've had a difficult couple of years where I haven't really been settled.
"But I'm glad this move has come about because I can work hard, get my head down and show people what I'm about again."
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