I just wanted to brag...
Did you tell everybody the news?
Yes!
It is nice when people appreciate the things we do but it is not good to brag. People will think that you are annoying.
I don't wanna make a mistake.
Some people find it rude to brag. But I totally get wanting to share achievements with others. Try to think about your tone when you tell them so it doesn't come off brash or know-it-all.