The defender is also targeting a return to the Europa League squad for their third round tie.
The 16-year-old was handed a starting role in the game with the Addicks, playing the game in midfield alongside fellow academy star Josh Cullen.
The duo were tasked with protecting the back four from the Charlton attacks and he says the defensive duo of Ogbonna and Tomkins were talking to him all game, advising him what to do.
"Angelo and Tonks were talking to me all game, just saying cover, cover them in front," he told whufc.com.
"They did a good job. It was a good challenge for me. Josh [Cullen] and I were talking before the game. We said one and two touches and then pop it. Angelo [Ogbonna] was telling us the same, one and two touches, so we just did that."
The youngster has enjoyed a busy season under new manager Slaven Bilic, with the Croatian boss having utilised several other young players so far, too.
That is because of a busy schedule which has seen them start a month earlier than everyone else thanks to two Europa League qualifying ties coming early in the campaign, with a third round yet to be played.
Oxford started both legs of the first round tie against FC Lusitanos and is hopeful of forcing his way back in - but insists qualification to the group stages is what truly matters for the club.
"It's going well, I’m getting a lot of games in," he added. "Hopefully I could [get back in the squad] but hopefully the team can just progress in the Europa League and get to the group stages."