8) Not understanding the Attribute that affects to hit the most for Finesse/ranged weapons Dexterity, For all other weapons - Strength. Cleric spells Wisdom, Wizard Spells Intelligence, Warlock spells Charisma
Importance of the word "spells" its certainly worth mentioning for new players ...
Sometimes you get some spell from magic item, or scroll, or w/e ... Attribute is choosem by spell, not your class.
It was kinda sad when i find out that my Warlock cannot efectively use scrolls with Wizard spells since i dumped Intelligence.