Which are the most useful resources to learn about how to make chatbots?
Do you have any technical skill? If not then there are a TON of easy to use platforms that you can make bots pretty quickly with. If you do have some programming skills then id suggest going with node.js. I can be more specific if you explain your skill level.
I have a mobile (Android) background. I found a lot of resources about node.js but I would like to know if there is another way or platforms to work.
You can pretty much use any back end solution you want! PHP, node.js, ruby, Java, Python, c#, etc.
People keep saying node.js because it’s super fast to get up and going with and has tons community support behind it.