I've seen somewhere learning that a second language can slow aging. I think always I make mistakes when I'm talking about the weather.
Today in the morning there was a clear blue sky, but in the evening it was pouring outside and it was very dark outside. It wasn't thundering. Are you afraid of thunder? I think sometimes that lighting is beautiful. Due to the heavy rain, I couldn't join my class at the right time, but we started it at 9pm. We talked about some different topics. One hour went by very quickly. These days are rainy and I think it's the best time to stay at home and read a fantastic story book with a coffee.
My exams are on my hand [?]. It makes me bored to study in this rainy weather, but the fact is, whether I study or not, I still have to take my exams. So I must want to study. It's not a new thing.
** Review the meanings of 'soon' and 'quickly.
** You wrote 'in the morning' correctly, for describing things that occur in the evening, we can also use 'in the evening'
** 'By the way' is more of a colloquial term than something we use in more formal writing.