Only show posts from TAG

Hi, I wonder if someone has written anywhere any instructions on a blogposting on how to set up specific subpages around specific tags.

E.g. on my Blog at https://edward.de.leau.net I want to create a section for the posts with the tag “RISK”, I want a different header (a risk board) and a different layout and sidebar (links to online RISK games).

I also want to do this for other specific tags.

I also want to exclude the postings with the tag RISK from the frontpage but I do want to keep the pageswitcher/counter on top of the page which enables you to step through the pages.

I’ve seen some examples for the use when using Categories but I have not seen examples when using tags.