As I have observed, SE never had a proper tutorial mode where beginners could learn the fundamentals of the game and obtain rewards as well after completing these tutorial modes which is usually the standard in most TCGs that I play like MTG Arena for example. The current mode which is the campaign doesn't really help the beginner players to understand the basics of the game in my opinion. Things such as sac choices, how to use your resources wisely, different card abilities, etc need to be properly explained in the tutorial mode. Please create a proper tutorial mode for SE as soon as possible.