The settling in period for any tarantula is a variable. If you are checking/ bothering it constantly, that period will most likely be longer; So, give it peace and quiet, time and patience.Just got an A. Avic a few hours ago and it's still hidden in a spot on the substrate under something. When shall it go arboreal? It is very young.
same here, when my avic slings were too small to tackle crickets I'd feed them cricket legsSome tiny Avics don't really web all that much either, in my experience.
Avic slings are also scavengers, so frequent trips to the ground aren't unheard of... that's how I would feed my sling that would only eat prekilled - by placing the dead prey item on the ground.
Just give him/her a little bit of time