I did some dumb things lately.
What did you do that was so dumb?
I wanted to insult my mom. I thought she would get very angry if I did so.
While you seem to have remorse over your actions, it still wasn't appropriate to try to insult your mom and get her very angry. If your mother has been doing something that bothers you, you should try to discuss the issue with her calmly and try to resolve it peacefully. Insulting your mother to get her angry will just make the situation worse and should not be done.
I'll listen to you and talk to her later.
That's good to hear! It's always better to be respectfully direct. People can't read minds.