Mason Bennett is desperate to make up for lost time at Derby after returning from a five-month injury lay-off.
The striker became the club's youngest player when he started in the Championship against Middlesbrough at just 15 years and 99 days old.
His Rams career has been stop start since that game in 2011, but he played as a substitute in the EFL Trophy loss against Doncaster Rovers on Tuesday.
"It's been a long five months," Bennett, 20, told BBC Radio Derby.
"I had a taste when I was 15, but it has been disappointing since then, I am not going to lie.
"It has not worked out but this season I am going to get my head down, work hard and knock on that door."
Bennett has had several injury issues since making his debut and has only made 34 appearances for Derby, with just four coming as starts.
He has had loan spells at Chesterfield, Bradford City and - most recently - Burton Albion, where he linked up with former Rams manager Nigel Clough.
But although Bennett helped the Brewers win promotion to the Championship, he suffered a serious groin injury against Colchester United in April.
Bennett, who missed a spot-kick in the penalty shootout loss against Rovers, added: "You want to be out there but injuries are part and parcel of football and you have to deal with it.
"It's now all about getting some minutes under my belt and trying to find my form, keeping that consistency and trying to push on."