The only sure way of knowing whether Alex is male or female is to either wait till he/she is old enough for a ring to show if male when they have matured. I have heard peoples birds showing signs of a male ring at 12 months of age but I think anywhere between 12-18 months old. Or have your bird DNA or surgically sexed.
For your second question.....YES, Alex WILL fly away if the wings are not clipped or not wearing a harness when you take him/her outside. No matter how tame he/she is, all it takes is a fright and he/she is gone.
Not biting your finger will take time and patience. You need to gain Alexs' trust with gentle training. Just take things slow. Besides ALL birds bite at some stage. I have a range of birds from Conures, Galahs, Rainbow Lorikeets, to Cockateils and obviously IRNs and
ALL will bite if they are in a cranky mood.
Maybe if your bird is out of his/her cage you could try putting your finger under the chest (just above the legs)and press gently, asking Alex to "stepup" in a firm voice. If he/she lunges or bites try not to pull away as then you have just shown that you are scared and Alex has dominated you. Say "NO" or "STOP" or some other command you want to use and maybe use food or toys as distraction to help take the focus of your fingers. When Alex does stop, tell him/her "good bird" and reward immediately. Don't wait or he/she will not associate not biting and good behaviour with reward. You will need to do this EVERYTIME to train Alex to not bite. Also when you ask Alex to "stepup" don't show fear or hesitate as birds can pick up on that.
This method has worked for me, might work for you to.
Good luck with Alex
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