I'm taking care of a male team, the A-team, which has mostly expats players. We don't have regular training sessions, but we try to play at the German school on Monday nights at 8pm. You are most welcome to join us if you are more than 18. We just play for fun, and girls have been joining us in the past. If you have a facebook account, join the group Handball German School Singapore (http://www.facebook.com/group.php?gid=340538194634
Every week (nearly), I will create an event to see how many players can make it. The big problem is the weather, because the court is outdoor, and is very slow to dry. So if it rains in the afternoon, the court is not dry at night and very slippery, so we have to cancel. That's why in the end, we don't play very often...
Another solution is for you to check out at Braddell Heights CSC (50 Serangoon Ave 2, near Serangoon MRT) on Friday nights at 7:45pm. I believe some girls teams are training there.
Good luck, I hope you can find a team to join!