Costa Rica Apostille
https://www.merchantcircle.com/blogs/acma-los-angeles-ca/2021/8/Costa-Rica-Apostille/2072065
Ask those you know for their lawyer recommendations. You may be surprised at the results here! People you would never have expected to know a good lawyer, may have the best connection of all. It's this word of mouth recommendation that means the most, so take it seriously and make this your first step.