I would recommend you look into Obsidian. It's literally made to be a second brain. There's some really good AI plugins, I use the "copilot" plugin which uses y

I would recommend you look into Obsidian. It's literally made to be a second brain. There's some really good AI plugins, I use the "copilot" plugin which uses your own Open AI API key. You can sync using Syncthing, iCloud or pay for Obsidian Sync. For personal use Obsidian is free.