Personal Management System: php, symfony, management, free, mit, system, webapp

I decided to create my own system, because first of all playing around with tones of plugins for WordPress and writing customization to some existing CRMs would take me as much time as writing my own system and therefore by knowing the logic from core it's easier for me to write extensions and add additional modules - whichever i just need. Second of all, there is no system like that, and i didn't wanted to end up integrating docker based cloud with CMS. Furthermore i just need application like that to keep organized and I'm really tired of having some very personal data on OneDrive, other on Google cloud. Some notes here, some notes there. The end goal is having an application running on terminal or raspberry 24/7 plugged into home network, without access to internet.