"Scott, it's your first time taking Magic Potion. If you feel uneasy, you can ask Green Tide or Gu Ying for assistance, or even me, but I think you shouldn't be too nervous. Taking Magic Potion only hurts momentarily, and then you won't feel much after that,"
"As for Green Tide, since you switched from Wavepatroller Swordsman to Tide Messenger, I've already searched for the best possible advancement in the same sequence for you. The possibility of mutation is very low in theory, but it's better if you eat more fish instead of land-based food during this recent period. It's advisable to continue doing so for a week before taking Magic Potion."
The advice given by Ian was the most pragmatic and had the highest success rate.