Autumn Morning

I love Autumn.
I love to smell the air of wet leaves when I wake up in the morning and open the window.
I do washingup and make a hot tea. It's almost 6 a.m.and the sky is still grey.
I put some slices of apple onto the tea cup.
After finishing my breakfast, I have time to think about what to do this weekend.
I go hiking to the park if it's good weather. I like to walk through the forest bath.
The best season is coming.

I love autumn. (You do not need to capitalize seasons such as "summer", "autumn", or "winter" in a sentence.  But yes, you do capitalize it in the title)
I love to smell the scent / aroma of wet leaves when I wake up in the morning and open the window. 
I do the dishes and make a hot tea. It's almost 6 a.m.and the sky is still gray.
I put some slices of apple onto the tea cup.
After finishing my breakfast, I have time to think about what to do this weekend.
I go hiking in the park if the weather is good. I like to walk through the forest
The best season is coming.

(I get the feeling that you are learning mainly British English, instead of American English...am I right?  "Autumn" is more of a British term, while "fall" is more frequently used in America.  Similarly, I have never heard of "washing up" and I have been in America for 20+ years; we mostly say "do the dishes".  "Gray" is more American, while "grey" is more British.  And you go camping IN a park, but you drove TO the park.  I hope that helps!)

Autumn Morning

I love Autumn.
I love to smell the scent of wet leaves when I wake up in the morning and open the window.
I do the washing up and make a hot tea. It's almost 6 a.m. and the sky is still grey.
I put some slices of apple into the tea cup.
After finishing my breakfast, I have time to think about what to do this weekend.
I will go hiking to the park if it's good weather. I like to walk through the forest bath ("forest bath" makes no sense, do you mean the forest? or a path?).
The best season is coming.