I think that a personal wiki should be primarily ‘for you’. Keep the barrier to writing in it low. It’s not performative. If it’s a jumbled mess, that’s fine, as long as you can navigate through it. If others’ happen to find some needles of information in your haystack, great. But that’s not the goal. If you want to concretely share some info with the wider world, shape part of your wiki into an article.