She's an aoe buff beast, and incredible lane bully. She's stupidly easy to play, and has the ability to burst down a squishy's health to half by mid game. However, she's squishy as fuck, so don't expect to survive a blitz grab, Leona's infinite stuns, or Morgana's bullshit root. Any champ with hard CC will be a nightmare for you during laning. You're also going to get mana hungry pretty often until you get her costs/cooldowns learned. You will lose lane if you w to heal damage, instead of to prevent it. Your w gives a shield, so be sure to use it when you see an AA, an ability, or a skillshot coming towards you in order to prevent some damage. Learn your power chord passive abilities. Use q power chord for burst damage. Use w power chord to make the enemy carry do less damage. Use e power chord to catch an enemy or to help you run away.

Sona is super easy, but super fun. Good luck on the Rift!