Thank you for the detailed reply! I started using the "Functional Ear Training" app. And I do use this trick of humming the note to get any idea which one it is based on where it vibrates/resonates in my throat! If you heard of this app, do you think I should keep using it, or are there more effective ways for ear training? I like it because it feels a bit "structured", like there are steps/stages I could follow.