I think you're doing just fine.When I got my Pac-Man "peptio"
He was tiny also, barely 17 g at first he didn't want to eat either.
And I'm sure it was due to the stress of moving from one enclosure to another.
But once I got three sides covered and got the temperature and humidity sorted out.
And I got larger crickets he started to eat.
And as he grew I increase the size of his food I started breeding my own roaches
Feeding him nightcrawlers roaches and the monthly pinky mouse.
Now that he's almost 170 g he now eats A small jumper mouse once a month.
2 adult roaches A day Fed by tongs.