UK English correction; not USA. Depends on what your preference is but I can only do both but since I am born and raised in the UK, I will correct this entry using British English.

(The) first day of Fall

Hey everyone!
It's my first note and (I spontaneously wanted to write something)  and I guess/suppose I will write more after this.
Well, today was the first day of Fall (Autumn- British English) in my country, Iran.
For some people this season is their favourite and is often referred to as the 'romantic' season for some. Perhaps, due to the beautiful showers of rain and the people holding hands out of love.
How do you feel about Autumn?
I guess, it is not at all my favourite season, but it has It's own effect on individuals separately. 
Like, sleep is sweetened (sweetened does not make sense as it refers to adding sugar, sweeter is not a word, I would suggest words such as; delightful or satisfying) in this season or a hot tea tastes better due to the surrounding season:)

Anyway,
Get your umbrellas ready people and enjoy your autumn.

Bye

First day of Fall

Hey everyone!
It's my first note and honestly it just came to my mind to write something here :) and I guess I will write more after this.
Well, today was the first day of Fall in my country.
For some people this season is the best and some call it the romantic season !! Maybe because of its rain and warm hands of love!!
How do you feel about Fall ?
I guess it is definitely not my favorite season, but It has its own particularities.
Like, sleep is sweeter in this season or a hot tea tastes better :)
Anyway, get your umbrellas ready people and enjoy your Fall.

Bye

Very well written!