noob needs help with android adk

hello. i have watched a tutorial about building simple AR app. but i’m stuck at the start, because the guy uses the “get all planes” node from the “google arcore” section, and i don’t have it. i have installed android sdk studio. however the fileds in the sdkconfig are empty. so i have set the paths manually like follows:

C:/Users/…/AppData/Local/Android/Sdk
C:/Users/…/AppData/Local/Android/Sdk/ndk
C:/Program Files/Android/Android Studio/jre/bin

could it be that the node is missing because the paths are set wrong? if so, how should they be set?
thank you.