How to navigate here?

Use the top line of each page for navigation on this site. It is a special primitive naviagtion bar. It moves in a simple hierarchic system with the homepage as root. Watch the line as you click, what happens near the slashes, and you will soon be familiar with it.

Within the text you find links to other websites. Those bring you out of this homepage at all. Then use the Back-Button of your browser to come back.

The above described navigation bar I call the 'Miniframe'. Because it works like a "Frame", but the html site structure is much more primitive as with real frames.