这样回答HR的询问is OK, nothing to worry about.

Not the best answer, but OK.

Dear HR,
Thanks for your email.
I am so happy that I joined the great company with nice manager and nice team. Although I just started in a short time, I can see there are many things I can do. I really like it. I am sure I will be a value member for the team soon.

I am so far so good, I will let you know if there is anything I will need in the future.
Thanks!