How to get into reading existentialism?

I've read white nights and loved it despite finding it hard to understand multiple times. I sat through it and read it multiple times and got it in the end. The end achievement feeling gave me a dopamine for sure. But I've been reading some of kafka, dotevosky, sylvia, etc...but I just can't because they are so hard to understand because of their continuous sentence structure and language so I need advice on how to actually learn to understand those better and in a easier way if possible. I don't want to use any ai or anything to understand it since that would just make me reliable on it and take out the joy of reading the book 😭. I'd really appreciate it if you give me your opinions and advices 💕