That is terrific news happy for you and your pigeon too.
In sexing a pigeon first exclude the middle toe and disregard it. If the two adjacent toes from the middle toe are the same length it is female. If one is noticeable longer it is male.
Handling different birds you develop and instinct...
At that age it has two strikes against it
1) it has not learned to forage on it's own.
2) it has only a basic instinct of predators.
In it's favour
1) It should have a strong homing instinct.
2) It did not fly far.
If it has not returned in 3 days I would expect the worst.