Lhasa apso, is 3 months old, he like to nibble and bite me and be aggressive. What should i do calm him down?

I have Lhasa Apso, who is 3 months old and he is aggressive, bites and nibbles. he likes to dead leave, cockroches, and lizards. I would like him to know how could i get him to stop and be more obedient to me. Help me pl.z