The 18-year-old is a product of West Ham's academy and was handed his Premier League debut in August 2015, starring in the 2-0 victory over Arsenal.
However, Oxford struggled to tie down a regular spot with the Hammers and was loaned out to Reading for the second half of last term, making five appearances.
The versatile defender was loaned to Borussia Monchengladbach for the 2017-18 campaign but is yet to make his debut for the Bundesliga side.
Oxford insists he is ready and raring to go and hopes that his time away from England will eventually help him to develop into a player capable of turning out for the national team.
"I'm just ready now, ready to make my debut, and hopefully it'll be good and I won't look back from there," Oxford told Sky Sports.
"I just hope to return to West Ham as a more experienced player, ready to play in the Premier League or any league.
"My long-term goals are to be in the England squad, play in a World Cup and be captain for my country, I've always wanted to be that."