I'm not sure if there is better a place for this query but I am sure will point me in the right direction if it isn't

I currently have some film I am trying to finish, it is a standard Fuji 400ASA and when I have finished it, I want to have the negative role scanned

When I have had this done in the past, I just haven't been happy with the digital result, the pictures seem grainy

Is it the film, is it the scanning ?

What should I be asking for when the negatives are scanned

Finally does anyone know of a reliable place to take the film to here in Perth ?

Thank you for any and all advice