The striker got off the mark for Rovers with his superb solo effort in the win at Charlton Athletic on Saturday.
And he knows he must find the net regularly this season if he is to make the most of his first full campaign in senior football and realise his ambition of starring for the Premier League giants.
“I want to score a lot of goals in the men’s league,” he told the Free Press.
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“That’s what it’s going to come down to at the end of the day for me, scoring goals.
“I want to do that and help the team.
“I guess the physical side is a lot different to the U23s and it’s what I need, to experience men’s football.
“My coaches at Arsenal just said to go, get experience, score goals and come back a better player. They said to be the best that I can be so I’m trying to do that.”
It has been reported that the majority of League One clubs enquired about the possibility of signing John-Jules on loan, while he also had suitors from the Championship.
But he says Rovers stood out as a complete package for a potential loan move, with the persistence of manager Darren Moore paying off.
“I spoke to the manager before I came and he showed a lot of trust in me,” the 19-year-old said. “He saw my potential.
“He said he’d work closely with me and that’s what I need to improve me.
“The manager likes to play good football on the floor. It suits my style of play. It was another big reason why I wanted to come here.
“He was very crucial. He’s been persistent with trying to get me in.
“I like when a manager shows that he trusts me, which he’s been doing.
“We’ve had a lot of conversations before and during my stay. I'm happy with how things are going. He’s a great manager.”