This is my 1st post on this forum as well a first time owner of a irn

My irn is Tekki not sure if he is a boy or a girl as he/she is 9 months old
He/she was previously owned and had bonded with his last owner but we have made slow steady progress with the taming and training... He seems to have bonded with me which I'm over the moon:) about but doesn't want to go to nobody else and seems scared of the rest of my family

I have a few concerns and questions just to see what is normal behaviour
Firstly the biting tekki will be sitting on my shoulder happy and talking to him/ her also and all of a sudden bite my ear or bite my freckles on my neck or I maybe holding a toy whilst he chewing on it and nip me on my fingers or he starts trying to bite through my clothes or hanging upside down on my arm and bite my elbow he will willingly step up but sometimes bites when I tell him/her to step up too I'm hoping this is just a stage ? And chews and licks everything is that also normal ?
He/she likes to whistle and I always encourage that rather the screaming and I've Tried to ignore that but still screams is that normal ?
What age do they start talking ???
Thanks all look forward to your Reply's