rewriting my urls

Read: Using_Permalinks

doesn’t work the way I want it to. Adds dates, months and all other stuff.

No, it doesn’t–or at least, not for pages. It adds dates and months for posts, because they are date-based and to prevent errors if you give two or more posts the same name.

With pages, it will rename them from

https://yoursite.com/?page_id=5

to

https://yoursite.com/page-slug/

Try it yourself and see!

And you don’t have to choose either of the default pretty permalinks, you can make one yourself. I use post_id/postname and pages get no ids in the url.