The most important decision for new players is chosing one of the guilds. This will determine, among other things, the attitude of the character encountered during the game. Depending on the selected guild, you will be able to learn from different people.
However, you must first join of the minor guilds: militians, mercenaries or novices in the monastery. After that you will be able to advance, becoming a full member of one of the "major guilds": Paladins, Dragon Hunters or Fire Mages.