Checks, saves, and attacks
An ability check tests effort. A saving throw resists danger. An attack roll tries to hit a target. All three often use a d20 plus bonuses from the sheet.
Volume One
Intermediate Topics
How common systems connect and what players will encounter during play.
Combat has a turn structure
Initiative orders turns. On a turn, a character usually moves and takes one main action. Some characters also have bonus actions or reactions based on their features or the situation.
Resources matter
Hit points, spell slots, class features, equipment, and rests affect what a character can do. The game becomes clearer when you see how those resources recover or run out.
Teamwork beats isolated optimization
A strong character still needs the party. Frontline defense, scouting, social skills, support magic, damage, and utility all matter in different scenes.