The magic in your body manifests physical traits of your draconic gift. Your Hit Point maximum increases by 3, and it increases by 1 whenever you gain another Sorcerer level.
Parts of you are also covered by dragon-like scales. While you aren’t wearing armor, your base Armor Class equals 10 plus your Dexterity and Charisma modifiers.
RollQuest ships the D&D 2024 SRD as a content pack, on a 5e character sheet that does the maths - roll from the sheet and let the numbers work themselves out. Free to start.