Your DNA is pretty low...it would helpful to know your e-antigen status. It is routine now in some countries to vaccinate infants for Hep B. If your wife was not infected then I think the chance that you would have infected your child as a result of incidental exposure (kissing, hugging, diaper changing etc) is quite low. There are some Hep B dads here who found out when their kids were a little older and I think they can tell you that their children are fine.
Get everyone in your house tested and vaccinated and post the rest of your labs and we can help interpret them. So far it looks like you are doing great.
For your wife, make sure she is immune: anti-HBs positive;
for your baby, make sure he completes the vaccination followed by a test that says he is anti-HBs positive;
and for yourself, make sure a doctor in the know is monitoring your liver.
Your DNA VL is consider low and you need to find out your e antigen status. First thing first, you need to ensure that your wife is protected and vaccinated. I presume she is not a carrier as Hep B test is normally carry out during prenancy. The 1st 2 shots should provide pretty good protection to your baby - Zellyf will advise you once she sees your post tmr. We are not a dr......