Education is one the best to guide you before entering the trading market, if you have a friend who has experience enough to teach you or to guide you before entering the trading market will be great. Also prepare some money that you can afford to lose before starting trading it will help you to prevent any emotion burst 
Gaining knowledge from your friend must be a good idea but you need to be careful because what you could learn from your friend must be comparatively lesser knowledge than your friend's knowledge on crypto trading which is reason we must go for generalized resources rather than depending one or group of people.