4. Learn from the pros!
If you're unsure whether cross-country skiing is really your new winter sport, then you should take a cross-country skiing course. This course will teach you all the correct techniques for pushing off, gliding, and braking, as well as emergency falls. After just a few hours, you'll quickly notice tremendous progress :)
P.S. Already an advanced skier but want to refresh your brain cells after a summer break? A course at the start of the season works wonders!