There are currently 2 forms available for shows and for comics. If you are more technically minded you can register an account right away, await the correct permissions via email and then use the usual wiki syntax to create your pages.
Navigate to the page you wish to edit and from the top menu select Pagetools → Edit page. You will need to create an account if you haven't already. Code it using wiki syntax or the FCK Editor button.
No problems! Go to Pagetools → Old revisions and restore the last good version.
You'll get the hang of it!
There's an app for that, see https://www.dokuwiki.org/plugin:vshare
There's an app for that too, see https://www.dokuwiki.org/plugin:gallery. First you'll need to upload pictures to your namespace goto
Click on Select Files… (it's a very subtle button) then upload. Then when you place the code
in your code you'll see a gallery of all those images