The British boxer returned to the ring with a knockout win over Bogdan Dinu over the weekend and is looking to become a world champion.
Dubois told the Sky Sports Toe 2 Toe boxing podcast: "I'm very confident in myself.
"I believe now with a bit of help from [new trainer] Shane [McGuigan], the team that he has, and what I've already got and what I've already been doing, the way I train, I've got a great chance of winning a world heavyweight title.
"But I'm ready to pick a way again and start fighting whoever they put in front of me."
Dubois suffered his first career loss to Joe Joyce last year and is confident that he would be victorious in a rematch, but is not making revenge a priority.
He said: "Not too many hints, but I know I could definitely beat him [Joyce] with some different changes and doing things a little bit differently.
"I know that with a bit more experience and just using the tools properly that I have, going about it the right way, I can definitely beat him.
"I definitely want to get revenge and that's part of the comeback. I've got to right the wrongs and just get rid of my errors and my mistakes and hopefully clear it up again with Joe.
"I want to get back what was taken from me. The titles and all the belts."