Just use it how you want to use it. For me, a bit of structure is enough - too much and it becomes unwieldy. But don’t let anyone tell you it’ll either save your life or become your “second brain”, that’s all bullshit. Just stick with no plugins or a small and solid set of ones you love. For me probably the only absolutely critical plugin is omnisearch, but YMWV.

My other advice is that it’s fine to boot up new vaults for other things. I’ve got two main vaults - a sort of work KB and a journal. But then I’ve got a bunch of smaller ones - songs I’m writing, courses I’m making, writing. Don’t be told that you’ve got to get some kind of universal thing that does everything. This is also b/s and often pedalled by the productivity wonks.