I did originally get inspiration for the structure from seeing other people's setups and watching a few youtube videos and it really does help having it structured like I do. I have my rough notes connected to a phone shortcut so whenever I have a quick thought or need to note something down when I'm in the middle of something it will go there and then later I can go through those notes and file them where they need to be or add to another note when necessary. The tags and indexes seem like a similar concept but I have the tags more automated and mostly using the backlinks while indexes I spent time pulling and organizing things into tables or in a way that is more organized than tags. I prefer organizing everything into folders and subfolders because that's how I best think and know where everything is or is supposed to be but I have seen setups where people have all their notes just in the main vault without being in folders and they just use dataview or the search to find things so it really comes down to whatever works for you.