This sentence is grammatically correct.
The bc an is plural meaning there is more than one and you just got 1 of many and a sounds wrong so "The" is the answer
Open and closed apostrophes from tomorrow to the exclamation point. if you can replace words I recommend changing "you're going to have to wear sunblock" to "It is recommended to wear sunblock." Also, probably remove the comma after tomorrow.
Answer:
As you are writing entirely from one person's point of view, first-person can be very limiting. The reader can only experience the world through that character's eyes, and so as a writer you cannot share the thoughts and feelings of others, only your narrator's interpretation of them.
