Roy Hodgson's charges face a Wembley double-header with Montenegro and Poland on September 11 and 15 respectively, knowing that only a maximum haul from the two games will guarantee their progression.
Rooney has warned his England team-mates that they cannot afford to be complacent, leading Group H by just one point, but insists the Three Lions can secure automatic qualification.
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"I'm confident, we're confident, but you always have to be sure you're not over-confident. These are going to be two tough games for us, but we're good enough to do it.
"They are going to be two tough games, though, because Montenegro and Poland are good sides and their best qualities are on the counter-attack.
"We will have to try and break them down and make sure we don't get caught out at the back. I think we'll do it, but nobody should think it's going to be easy."
The 27-year-old also allayed fears that he would not be fully fit for the crucial fixtures, after appearing to sustain a blow to his ankle in United's 2-1 victory over Sunderland on Saturday.
He added: "I've got a little knock but I'll be fine for England. I can't wait to be honest. As soon as the Sunderland game had finished, I started to think about England."