It's not a problem.
You can write in german too if your english not so good ;D
To your question...
First... you upload the H-Manga to a Filehoster.
Popular is:
http://uploaded.net/
http://share-online.biz/
http://zippyshare.com/
You can use a other Filehoster if you want.
Now you get a DL Link for the H-Manga (You need this later)
After this, you create a new post in the english section.
https://board.world-of-hentai.to/forums/english-translation.109/
You click an the button "Neues Thema erstellen" (Post new Thread)
Next you put a few infos in your post like, what Filehoster you use, filesize, language.... a Screenshot (Cover)
The Cover can you upload here (
https://images.woh.to/)
Then you put your DL Link in the post with "hide" [hide*]Your Link[/hide*] (without the *)
You click "Thema erstellen" (Create Thread) and done.