Hatem Ben Arfa scored the only goal of the game with a stunning a late strike that condemned Martin Jol's side to their second Premier League defeat in three matches.
"I don't speak in big words. We are very modest and we know how tough this league is, so my aim is to try to get 40 points, and the sooner the better," said Hangeland.
"Hopefully we can do that quite early and kick on from there.
"I know there are loads of big clubs and they are all spending money - probably more than us, all of them - so we need to keep our feet on the ground."
Fulham have added experienced striker Darren Bent to their ranks after he joined from Aston Villa over the summer and Norway defender Hangeland believes he is a key acquisition for them.
"He's a first-class guy who works really hard and gives us that thing we have lacked, which is a little bit of penetration and runs in behind," he added.
"We are delighted to have him with us."