Austin struck twice at Loftus Road to down the Villans and help Rangers stop the rot with a first victory since August after losing four of their last five outings.
Bigger tests lie ahead as QPR kick off November by facing both Premier League giants within a week of each other, but the striker insists that optimism is high after beating Villa.
"Scoring two in the Premier League - I'm over the moon but I couldn't do it without my team-mates," he told Sky Sports News.
"We've got two tough games coming up [away at Chelsea then home to Manchester City] but we go in to them now full of confidence."
Harry Redknapp's side face a London derby with Chelsea on Saturday, before travelling to Eastlands to take on the reigning champions seven days later.