There is only one page where posts will show up, and that is on the main page. You cannot make other pages and put posts on them. Pages you create are static.
What you can do is make categories for each subject that you want to cover and then assign posts to the appropriate categories. Then if you click on that category in the sidebar, it will take you to a page with just the posts in that category which will be in chronological order. In category view, most themes will show only a "summary" of the post, not the entire thing. The reader then clicks on the title of the post to get to the page where the whole post will show.