Well, it depends on your reading skills and experience with similar genres. If you're used to reading complex fiction, you may not find it too difficult. But if you're new to light novels or stories with lots of dialogue and internal monologues like Bakemonogatari, it could be tough. The good thing is that as you keep reading, you'll get more accustomed to the writing style and the story's idiosyncrasies, and it will become more enjoyable and easier to understand.
Another option could be to check at your local bookstore. Some specialty or larger bookstores might carry imported English light novels. If they don't have it in stock, they may be able to order it for you. Additionally, libraries sometimes have a collection of light novels, so it's worth checking there as well.
Well, one of the main themes is the relationship between the normal and the abnormal. The novel uses the presence of supernatural elements to highlight how the characters deal with things that are out of the ordinary. It's about how they adapt and change in the face of these strange phenomena.
Araragi Koyomi is one of the main characters. He is a high school student who has had an encounter with a vampire, which gives him some unusual abilities. Senjougahara Hitagi is also a main character, known for her complex personality.
I'm not sure about the popularity of this specific visual novel. There are a lot of visual novels out there, and while 'bakemonogatari' as a series has a following, the 'netorare' aspect might be a more niche or polarizing factor that could affect its overall popularity.
It's mainly about various supernatural and strange stories. The characters often encounter and deal with different apparitions and odd phenomena. It has complex character relationships and deep, often philosophical, dialogues.