I would definitely add some artificial plants for hides. A tiny baby like that would feel really vulnerable in so much open space. You can easily buy kritter keepers online http://www.amazon.com/Lees-Kritter-K...kritter+keeper
If you aren't willing to get a kritter keeper you could at least section off a portion of the tank to put the frog in a more enclosed space. You will also want to put some covers on at least 1 side of the tank.
It's a good start that you read the caresheet. You will also pick up a lot of info by reading the posts of others on here. You will find that most pacman keepers start their babies in kritter keepers within a 10g.
Good luck, you have a cute frog.