I use QOwnNote with NextCloud. It has a lot of features and is very enjoyable to use. It doesn't lock you down with a specific format. It just adds an additiona

I use QOwnNote with NextCloud. It has a lot of features and is very enjoyable to use. It doesn't lock you down with a specific format. It just adds an additional database for tags. You have the raw files with txt or markdown format organized perfectly in your folders. And with the ability to host the sync server by yourself, you don't need to give the sensitive information to third-party organization.