Obviously no right answer, but personally I think worrying too much finding the perfect tool instead of just integrating more knowledge to your PKMS is a distraction.
Rolling your own solution is especially limiting in the context of the sheer amount of integrations the popular ones (like Notion for example) support.
You're basically saying you will quickly build something better than the X hundred engineers at PKMS company Y quickly and it will continue to be better than what X hundred engineers will iterate upon.
I think that time is just better spent learning and picking the subset of features that, for example, Notion offers that really improves your learning rate.