Should I file an answer to uncontested divorce complaint?

My ex and I are still legally married. We have two small children together. We have been separated for over two years. We each lead separate lives, and are in new relationships. She applied for legal aid, and I paid the fee they charged so we could finally get things started. Since she was the one who signed up, the lawyer she has is just hers, and I am without any counsel. I received the divorce complaint. I am not contesting anything as I will have considerable time with my children, we have no property or debt together, and child support has already been ordered. However the summons said I need to file an answer or I will not be informed of anything else that happens in the case. I have no idea how to do that, or what other documents I may need to file as well. Even though I am not fighting anything, I still want to be informed, and wish to attend court hearings. Hiring an attorney is not an option as I am barely getting my bills paid. What do I do?