Summer vacation

I really would like to go on summer vacation! I'm exhausted from staying in the city (for so long).
But it's hard to choose which a place is perfect to enjoy to visit to relax this summer.
I was thinking Okinawa in which where I can could go snow cooling(?), and walk on see the beautiful beach, and also see fishes in at the huge aquarium. But my friends didn't don't recommend me going I go there in the summer because of the weather.
They know I have a sun allergy am sensitive to the sun and vulnerable to the super hot and humid weather.
Should I go to the north to avoid the hot weather?
Do you have any recommendations?

* In English, we say we go on summer vacation.
* The "from" is necessary to indicate that the cause of you being exhausted is due to staying in the city. The "for so long" is optional but aids readability and clarifies why you're exhausted. If you just say you're exhausted from staying in the city (without saying "for so long") it gives the impression that being in the city for any duration of time makes you exhausted.
* "Is perfect to enjoy" sounds weird. "To visit to relax" is more natural:
* Although you go to Okinawa to do things in there, when talking about places and the potential things we can do there, we simply say "there" because we've already established where we're talking about.
* I don't know what "snow cooling" is and I don't know what the activity involves so I can't think of a more appropriate word. Maybe just "play in the snow" works better though?
* While visiting a beach usually involves walking on it, in English we often use the word "see" for visiting places. "See" in these contexts doesn't just mean physically seeing it, it by extent implies doing things you'd normally do when visiting a place on vacation (walking around, doing things, buying food, doing things you can only do there, and so on.)
* Technically, fishes are in an aquarium, but most likely you won't actually be in the fish tank itself. Furthermore, aquarium refers to a place, and generally we say at when we talk about places. (e.g.: at the restaurant; at the aquarium; at the hospital)
* "Sun allergy" isn't technically wrong, but actual sun allergy is not that common (I'm not implying you might not have it) and generally saying we're "sensitive to the sun" is more commonplace. You could say "very sensitive to the sun" if you're very weak to sunlight.

"Summer Vacation.":

"I really would like to go on a summer vacation! I'm exhausted from staying in the city.
But it's hard to choose which place is perfect to enjoy visiting this summer.
I was thinking about Okinawa, in which I can go snorkeling, I can walk on the beautiful beach, and I can also see the fish that are in the huge aquarium. But my friends don't recommend for me to go there in the summer because of the weather.
They know that I have a sun allergy and that I am vulnerable to the super hot and super humid weather.
Should I go to the north to avoid the hot weather?
Do you have any recommendations?"

*This is not an endorsement of and / or for aquariums (which might also be known as "marine parks").*