There is no right answer to the question of when to tell people about your decision to convert to Judaism. In this section, I am going to discuss telling your parents about the conversion, although these general ideas can be applied to telling others as well.
People vary greatly in their approach.
Some write a letter. Others talk over dinner. Some drop hints, such as giving books on Judaism, to get their parents used to the idea of conversion. Some never tell a parent. You should decide, in consultation with a partner, a rabbi, a trusted friend, or a counselor about the best approach for you.