Help check my letter, many thanks.

[bigsky888]

Mrs Wilson,

I am ready to go out today and inform you of something. One thing is that I have returned your book to the library in time. Besides, Tracy called and left a message to tell you that the meeting at Bolton Coffee has been canceled and Susan already has knowed. She hopt you recall her as soon as possible. What's more, it's my first time that I have went shopping abroad. That's will be fun.

That's all. Having a good day.

Yours,

###

 

[teechar]

Hello bigsky888, and welcome to the forum.
Could you please correct the information on your profile page first?

Note that "having a good day" means "I am having a good day", whereas "have a good day" means "I wish you have a good day."

 

[rodgers white]

Mrs Wilson,

I am going out shopping [STRIKE]today[/STRIKE] and I’d like to inform you of three things. One thing is that I have returned your book to the library in time. Besides, Tracy called and left a message [STRIKE]to tell you[/STRIKE] that the meeting at Bolton Coffee had been canceled, and she felt very sorry about that, but hoped that you could set some other time for the meeting. Also, she wanted you to know that Susan had already been told. What's more, she asked you to call her back as soon as possible. By the way, it's my first time to go shopping abroad. I am sure that will be fun.

Have a good day.

Yours,

###

Bigsky888, see the version above. It is my attempt at correcting your letter.

 

[teechar]

she asked that you [STRIKE]to[/STRIKE] call her back as soon as possible.

.

 

[tedmc]

I am going out shopping today and I’d like to inform you[STRIKE] of[/STRIKE] three things. [STRIKE]One[/STRIKE] The first thing is that I have returned your book to the library[STRIKE] in[/STRIKE] on time.

I think "of" is optional but I prefer to have the sentence without it.
Being punctual for something is being "on time" for it.

 

[emsr2d2]

"I'd like to inform you three things" is incorrect. You can use "tell" without a preposition but not "inform".

I'd like to tell you three things.
I'd like to inform you of three things.

 

[tedmc]

OK, then I would rather use "tell" than "inform..of/about".
"One thing" does not connect with the "three things".