Where can I learn the skills of Star Diamond Tale?

I guess you never watch NPC conversations, do you? As a novice, the novice tutorial in the game is very detailed! You can learn skills with skill cards, but there are requirements! Are you in Coca-Cola? You can buy it in the TM hut on the far left, or you can buy it in other places: under the ruins, at the bottom of heaven, at the far right of the United States and Canada. Two-turn skill cards are randomly obtained from the card sister's 10W card sleeve!

Please pay more attention to NPC's conversation and tell you everything! Look at nothing, of course, I don't know anything!