First paragraph: Talk about your preparation before starting your journey. for example, what did you bring? Did your mother prepare something to eat when you were in the car? What did you do in the car? Talk about your hometown.
-What did you do once you arrived?
-Who did you meet first?
-Did your grandparents prepare something to eat? (talk about the food)
-After that, where did you go? (it can be anywhere, ex: waterfall, river)
-What did you do there?
-Talk about different events, it can be split to a few paragraphs.
-Talk about ho you felt during that time
-Use past tense
-Pay more attention to your grammar it can help you get more marks
GOOD LUCK! :)