Questions-Periscope, internal views, free cam

[Two-Six]

Hi all,
I have just started playing and so far I have a few questions.

How can I raise the magnification and zoom in the periscopes view?

How do I lock the external camera so it tracks my sub and other stuff?

I can't seem to explore the inside of the sub like in SH3 like going into the captains quarters, the radio room and conning towers. How do I do this?

I can't seem to be able to access the diffrent stations from the captian station, like the navigation screen by clicking on the map table, or the torpedo control panel by clicking the weapons panel....Know what I mean? How do I do this?

That's all for now