Is this year okay to attend funeral for year of the rabbit? What to do to avoid bad luck?

Of course you can, though this year could be a hard year for the rabbit. Although you should very cautious this year, the funeral couln not make you trapped.
To avoid bad luck, you'd better tend to be more gentle to people around you and try to communicate with your family and friends more. Furthermore, you need be more careful to take care of yourself.