Becoming a teacher in Switzerland as a foreigner?

Hello everyone, I am a Cuban (Spanish national however) and I am looking into, after I graduate, becoming a History/Geography teacher in Switzerland. At the current rate by the time I graduate I should be fluent in French, but I am also fluent in Spanish and English. I still do not know where would I go to, but most likely Geneva.

My question is, how good or bad is the teaching career in Switzerland? I would have a degree in History and another one in Geography with a master's degree for teaching (required in Spain, where I am studying).

How good is this sector, what are the salary ranges (I have seen around 6000CHF but I would like to hear from you). Are teaching jobs hard to get? Is my Spanish degree worth something in Switzerland? What type of schools should I or can I get into, private, international, public, etc.

Most importantly, is there a high demand for these teaching areas in Switzerland?

Thanks beforehand for your help and have a great day!