Well done! In addition to what has already been corrected by another user, I would address your use of colons. For example, your second sentence is two separate sentences. "It is sunny outside. However, my inner world is a little cloudy." For more information on the use of colons, you can visit this site: https://magoosh.com/pro-writing/when-to-use-a-colon/. Hope this helps.

Today-Dairy

Today is April 27, 2020. It is sunny outside; however, my inner world is a little cloudy. There are tons of things waiting for me to sort out: a meeting that makes me nervous, two classes that have sophisticated thoughts which I could not comprehend, and an difficult assignment due in two hours.

this is a great piece!

Today-Dairy

Today is April 27, 2020. It is sunny outside; however, my inner world is a little cloudy. There are tons of things waiting for me to sort out: a meeting that makes me nervous, two classes that have sophisticated thoughts which I could not can not comprehend, and an difficult assignment due in two hours.