My wife is a CASA. You don't need to have special qualifications going in. You apply and they will interview you. If you are accepted, there is a bunch of training. They also do ongoing yearly training, but it's not too onerous.

Once you are trained and assigned a case, you'll typically be working under a more experienced CASA who you can go to for help and advice. It's not usually a huge time sink. Visits with your kids every couple of weeks, court hearings, monthly written reports. Emails and phone calls with social workers and the family and the kids' attorney. You can work around appointments. For a long trip you might need your supervisor to help out, which is part of what they are there for.

Some cases can suck up quite a bit of time, but not usually for a protracted duration. It tends to come and go. Ideally, you only work a case for a few months to a year. Rare ones can drag out longer, but with long periods of low activity.

You don't really have to navigate the judicial system; there's an attorney "ad litem" who does that. But you will get training on the applicable laws so you know what you can and can't do.

You will want to set some boundaries, as there are people in the system who will take advantage of you if allowed. Some of the family members can be obnoxious, and some of the social workers are practically useless. Some parents will get pissy with you, and even some social workers. It can be frustrating at times.

If your experience is like my wife's, the kids will love you. And you will have the chance to make an important impact on their lives. Your role is all about what is best for them, not the parents or the court or anyone else. You are the only person who is just looking out for them and is only working with one family at a time (unless a case has gone mostly dormant so you can take on a new one).

Everyone else in the system has too many concurrent cases to give any single one the proper attention. You have virtually no actual power, but for the kids you might be the most important person in the process. You are the one who needs to raise a little hell when a child's needs are not being met. The kids usually seem to understand that you are there just looking out for them.

If you have the disposition for it, it seems to be very fulfilling and important work. I'm very proud of my wife for doing it.

At least, that's how it works in Colorado. Other states might do things a bit differently.