Mastery of the language:
The native language in Switzerland (Swiss German/French based on the Swiss region you reside in) is your superpower (no kidding). And, superpowers are tough to attain! The first steps to learning the language are by using the free gift coupons from the Canton during the time of the registration process. This offer gives you a basic German course which is great to get you started, apart from that observing people, reading labels, switching the language on your favourite shows on Netflix and participating in knowledge exchange free sessions are extremely beneficial. Apart from that, apps like Google Translate and Duo Lingo help you get through language barriers on a daily basis.
On going back to school!
Studying abroad is always a brave step; it involves an investment, both, interms of time and money. However, if your intent is clear, it's worth a short! Here are a few pieces of what I learnt: a master's of science is not the same as "continuing education", a resident permit (for eg. B, C and not L) reduces your tuition fee by a factor of 10, writing papers and carrying out research is a constant and switching between full time and part time is possible but not practical.