I guess the first question is, can you watch this without seeing the rest of the series? Yes, but you probably shouldn’t, especially since the first eight episodes are available for free on YouTube. Also, the eighth episode is the first half of this movie, so you should skip that if you plan to see this in theaters.
Would you get what’s going on? Yes. On the other hand, you would not have the same sympathy for the characters and I think that’s kind of key here. There is a recap, but that can’t fix you not knowing and understanding the characters.