<human>: Can you summarize the given text in a few sentences?

First post here but I thought it will be fun to share my experience here. I'm not a English speaker so please pardon my grammar errors. 

I'm a 19 year old kid who is going to start university around this time in Japan. So, last week a Japanese teacher thought it would be a good idea to offer me for joining a service that teaches English or making conversation with local Japanese students in English to improve their English.

Since she asked so politely, I couldn't decline her that time and thought "How hard could it be? its just some forms to be filled and etc". Today, the teacher sent me an email about the application and hope the students signed up for this could print the form and hand it up on the 8th. Since I'm living in dormitory and not my home I'm lacking a lot of things like a printer. I thought its too troublesome and going to reply her saying that I am not joining the service. Moreover, I'm a first year engineering student so I thought I'd be very busy and no time. 

So, I proceed typing a sincere apology letter about turning down her offer but little do I know she actually forwarded the email to every single person who signed up for that service. Right after I tapped send on google inbox, I discovered that I'm actually sending the email to everyone. Now after 15 mins I'm sitting here typing this tifu and thinking how to say anything to the other people because most of them are staying in the same dormitory as I do.
<bot>: signed up for something , wanted to decline it because its too troublesome, didn't see who am I replying to, send everyone the email.