Follow the steps in this guide to build a PC, or Player Character, in Triptycho.
If this is your first character, consider using pre-built decks. Or, you may want to try playing with Deckless Roles to ease into the game, especially if you don't yet own any cards.
Every character needs a name. For groups that enjoy roleplaying, you'll also want to think about your character's personality, goals and motivations, history / backstory, and physical description. It's good to coordinate this with the other players and the DM so that the party gels together well and suits the story and world.
You can fill in these details last, lining them up with the options you selected, or you may start here, choosing your Background, Roles, and Gear based on the character you envision. You might even do something in-between, starting with a general conceptual sketch of the character and filling it out with your choices. It's entirely up to you!
If you're making a character that starts at a level other than 1, you only need to make a few adjustments to the sequence above.
If you're starting at level 6 or higher, choose a Destiny instead of a Background.
Finally, your starting Wealth value will be some number other than 20. You can find the Wealth-By-Level table on the Wealth page. Ask your DM if there are any modifications to this value. If you're a new player starting at a higher level, ask the other players for help choosing your Gear. If the entire group is new, it's strongly recommended to start at level 1.