What would be a suitable antonym of "reluctance" or "hesitance" that does not have the connotation of "rash judgment/action" or any negative connotation? Instead, I am looking for an antonym that suggests that someone is not afraid to deal with the problem at hand.
Willingness to do something.
a feeling of energetic interest in a particular subject or activity, and a willingness to be involved in it
'One of the good things about teaching young children is their enthusiasm.'
I think the following will work: embracement.