For tourists who want to learn the language before traveling to a Spanish country

I lived in Spain for 15 years, I grew up and studied there, and I did a level Spanish here in London. I am going to start teaching the basics of the language, such as greetings, how to ask for something, how to use the verbs, names of things, numbers, etc. Once they have learned the basics, I will teach them how to form sentences and how to have conversations. Then, I will also show them images and ask them to describe what they see on that image. I will also give them little homework so they can learn fast.