Assist feeding should be done as a last resort
If you have not done so here is what you need to do
Set her up in a 6 quarts tub (max) with aspen as bedding, use a plastic flower pot saucer as an hide (6 inches wide)
Provide a hot spot of 88 degrees (max), leave her alone for a week (no handling) and offer a live mousse hopper in the enclosure. Prey should be as big as the girth size of your snake.
DO not offer every other day the more you offer the more it leads to refusal, stick with mice for now as they are more enticing.
The animals looks good and for now you need to try to get her to eat on her own.