Skript-Yaml is legit the best skript plugin, to add yaml support. I use it in all my skripts, and so do other developers.
It allows easy storing of information in files, and its easy and fast to find again, using very little code. It's very nice to handle big data files with loads of data.
Link to skript-yaml: https://www.spigotmc.org/resources/skript-yaml.49829/
Thank you!