Like everyone said, no handling !!
On top of that you have to do everything to make the snake feel safe and comfortable. In one that young, it usually means going to a much smaller and more private enclosure until it eats well.
For now you can try to make the tank more private. Cover the sides and back with black construction paper (taped on the outside). Cover most of the top with a dark towel, just leaving enough open for good airflow or a lamp, if you have one.
Provide substrate for the snake to bury into slightly. Either Aspen or some kind of dark coco coir bedding. Make sure the hides are SMALL enough and dark. The snake has to feel snug. If there is to much free space, add another small hide or some fake plants.
If the snake is very exposed and in a light place, they don't feel safe. At least not until it has become better established at your place.
If you do all that, and things aren't working, you need to offer live food. You can always switch later !! If nothing else works, read the sticky about problem feeders. Sometimes you have to move them into a smaller tub to get a super shy snake eating reliably.
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