Need something like wikipedia, but only for me.

(I'm not sure where to post this so if this is supposed to go somewhere else please tell me.)

I have a bunch of information on a million different interests of mine that I want to keep organized. I want to seperate them into sections and have subsections and links to other websites and images, but creating a million google docs for that purpose or one giant google doc seems inefficient. Before you tell me about mediawiki and stuff like that, i don't want a wiki hosting service, or rather thats not what im looking to use right now. I just need one of those online website builders where you choose a template and then write whatever you want. The exact conditions im looking for but do not absolutely need to be met are;

-ability to put images.

-ability to make subpages, subsubpages, subsubsubpages, and so on.

-ability to link websites and/or files.

-free to use

-completely private

Thankyou very much for your help.