Update the Getting Started

Author: curquiza

README.md

@@ -67,8 +67,9 @@ NB: you can also download MeiliSearch from **Homebrew** or **APT**.
 import meilisearch
 
 client = meilisearch.Client('http://127.0.0.1:7700', 'masterKey')
-index = client.create_index('books') # If your index does not exist
-index = client.get_index('books')    # If you already created your index
+
+# An index is where the documents are stored.
+index = client.index('books')
 
 documents = [
   { 'book_id': 123,  'title': 'Pride and Prejudice' },
@@ -79,6 +80,7 @@ documents = [
   { 'book_id': 42,   'title': 'The Hitchhiker\'s Guide to the Galaxy' }
 ]
 
+# If the index 'books' does not exist, MeiliSearch creates it when you first add the documents.
 index.add_documents(documents) # => { "updateId": 0 }
 ```