I haven't uploaded a new file to TL before but on other private trackers it was fairly straight forward. I just created the torrent in QBit, filled out their upload form making sure to follow the rules as far as naming conventions, listing metadata for the file(s), including screenshots, and copying and pasting a plot summary from somewhere like IMDB, before finally completing it all and uploading my torrent to the site for mod approval. I'm away from my PC right now so I can't check but I'm sure they have their upload requirements listed in the FAQ or Rules page.

Another great way to build ratio there is to filter by torrents listed in the last couple of hours and grab them (especially freeleech) even if you have zero interest in watching the content and seeding it for as long as possible. The mods there recommended this to me back when I first signed up and got banned because I hadn't uploaded or downloaded anything within the first week or two of signing up.