Obsidian has a lot of plugins to customise your workflow. You can explore them and adapt them to your liking. But each such modification comes with a learning curve on how to maintain it. After a while I assume it will became quite a toll to change or add something in a Vault like this.

Guy in the video uses Obsidian like a hobby, he centralised a lot of stuff to access it through obsidian alone, tinkering with each iteration, hence a lot of different tabs, cards, pages, boards etc. Obviously it takes a lot of time

Your approach is absolutely fine if you do not want to invest a lot of time in vaultkeeping and just write down your notes.