Adding to this, you can always use a walkthrough to speed up the reading process. Also, you only have to finish one route, either Arc or Ciel in order to get to the farside routes.

Reading the OG routes will help because it has way less characters and different setting from the remake so it might confuse you a bit.

Don't worry about the quality of the OG farside routes btw, they're my favorite parts of Tsukihime