What is the main conflict in The Flame Trees of Thika: Memories of an African Childhood by Elspeth Huxley?

Elspeth Huxley, the author, and her mother Tilly arrive in Africa in 1913. Elspeth's father, Robin, has already arrived, having purchased the lease for a farm with plans to clear the land and grow coffee beans. Elspeth is immediately enamored with the land and is caught up with the people she meets and the animals. Though the region is often harsh and unforgiving, Elspeth thrives and dreads the time when she might be force to leave the country, returning to Europe.