Your network is not waiting for the perfect system. It is waiting for you to be organized.
Pick one tool from the list above, add 10 contacts, and set one reminder. That is 10x better than what you are doing now. business contact manager
Every day, spend 5 minutes adding new contacts and logging notes from calls. If you don't do this, the BCM becomes a digital graveyard. A final piece of helpful advice Do not overthink it. Your network is not waiting for the perfect system