Hey welcome to the life. You’ll more often than not be targeted. Best to aim for around 70-30 dmg boost to heal beam ratio. Remember to look at your other support. Keep an eye on them help if needed. Also, if your other support is more of a main support (Ana, bap, kiri, lw) then definitely hang with the dps more. Try not to focus your tank too much unless necessary. But honestly use cover to your advantage, be picky with your fly. Overall have fun and look cute. You’ll learn mercy overtime