A good one to start with is The Thirteen Problems; and my favourites, The Body in the Library and A Murder is Announced.
To appreciate the quintessential 'Englishess' of the village settings, the period and the characters in these books, try to borrow or rent the Miss Marple DVD series with Joan Hicks (NOT the more recent abominations with Geraldine McEwan.)
Is 'Christi" how her name is spelt in your part of the world, or a typo for "Christie"?
Oh, what a treat you have in store, ...and then ..........to be followed by Poirot!!
Student or Learner