If you have children keep them away from this young llama until he understands how to behave. If you have farm visitors put this guy on a halter, if he is halter trained, or put him away. It is not a bad idea to geld him. Gelding uncomplicates the problem but doesn't solve it. You must still learn to behave differently and set limits.
Female llamas can become disrespectful and difficult too.
My policy is to treat males and females babies no differently. I insist on respectful behavior from both sexes. Babies do best if they have other babies to play with. With other babies around in many cases, the whole problem becomes a non-issue. If you are going to have a single baby, think about forming a baby llama play group.