This forum is about rail travel. Trains are a fantastic way to travel around Europe : sometimes high-speed, sometimes slow and scenic,… You may get regular train tickets or a pass like Eurail.

Have a look a this link : https://www.seat61.com/how-to-use-a-eurail-pass.htm

Gracias por la respuesta. Que ruta en tren para principiantes recomiendan. Gracias 

Well there are thousands of railways so it’s hard to recommend!

There are plenty of stunning railways in the Alps, Bernina is one of them : https://www.seat61.com/trains-and-routes/bernina-express.htm