Watch Netflix on LG Smart TV?

I bought a used LG 42LM620S. It is a smart tv. I would like to see Netflix and Amazon Prime on it but I can't find the app for it. Is that possible? The previous owner said yes, but I can't explain how. Does anyone have experience there?

Which year of construction?

So press the following button on the remote control: Home.

After that you should be able to choose everything like YouTube, Netflix, Amazon Prime etc.

Unfortunately I can't otherwise it would be easy.

The previous owners said that it is about 6 years old

Then he is too old. From 2016 the models can receive the apps.

So you need a FireTv Stick.