Aww, she is gorgeous! Congratulations! There is no way to tell an F generation of a bengal without knowing the pedigreed names of the parents. I do have a large database (46,000 strong) of bengals and F generations. If I have the parents in my database with F generations, I can tell you the F generation of your baby. If not, then a certified pedigree would allow me to have the information I need.
As for vocalizing -- if your kitty is quiet now, enjoy it, because they do find their voice at some point. Mine is 10 years old and yowls all the time. I think all bengals can vocalize differently, but you will be amazed at the number of different sounds a bengal can make.
Happy to hear she has settled in great! Now, sit back and enjoy the adventures! That is, AFTER you have completely bengal proofed your home.