[Old Buzzard]

Please correct me if I am wrong, but am I understanding that you hived this package 2 days ago? On foundation? If so I wouldn't expect to see them take much syrup yet.They would only be taking what they are eating,(which they might get from foraging, normal bee behavior) If you installed on foundation 2 days ago they don't have anyplace to store it,and have no brood to feed, thus the requirements are not great. Their main requirement is their own nourishment, and to produce wax. I guess what I am saying is don't be alarmed that they aren't taking the feed. As their requirements go up as the hive progresses the next question is, "How can they eat this much?" Been there done that.

 

[Old Buzzard]

Still, that is only 4 days. One the hardest things ,for me anyway, was to learn that things happen inside a hive in bee time, not me time. Make sense? You should see things like comb starting to be drawn, queen starting to get bigger, eggs, uncapped brood, then capped brood.
They will only raise as much brood as they can take care of. The population of the hive increases, so they are able to take care of more brood so they raise more. Then their needs increase. As far as getting them to progress, you'll do just fine. You are making the effort,and you are learning.