Writing advice (please?)

Hi! It’s me again! As you have probably guessed by now, I love your books and the concepts that you come up with. Would you say that when coming up for plots or characters, it just comes naturally to you, or do you have to work for a while to get an idea? I’ve been tasked to write a novel for my english class, and I’m scared that I won’t come up with any interesting and or original ideas. Thought I might reach out to one of my favourite authors to maybe get some advice? Thanks!