ObsidianMD

I used to have this concern myself, but I think there's nothing to worry about if you label notes properly, giving them full YAML, source links, tags, etc. Searching is an extremely powerful tool, but it's only as powerful as the information you provide it.

Additionally, you could provide basic structure to your system if you desire. I personally prefer minimal structure, letting groups of notes emerge, which can later become MOCs (Maps of Content). These are the hubs where all my notes can connect together, which makes finding them later even more simple.

A lot of my initial inspiration for how I set up my Obsidian workflow came from Aidan Helfant. He has some great resources for how to get started and details about his own processes.

One more resource that I only recently learned about was Obsidian Publish. These are public Obsidian notes from people that have decided to publish them publicly online. This is Aidan's for example. It might help you figure out what kind of setup you'd like to try.

Ultimately everyone creates a system based on personal preference and experimentation so don't be afraid to try new things :)