How do you be assertive so people don’t walk all over you?

I’m relatively shy and very passive aggressive more passive than aggressive if you ask me lol; I’m trying to work things out with my mom and I don’t know how to stand my ground when she starts yelling I just shit my eyes n go to my happy place. And I know we’re not going to get any better if we don’t talk n I feel like if I could just speak up a little more then maybe she would hear me n we could talk. What should I do. How do I talk to my mom?
Updates:
13 d
I do.
13 d
Well did I got kicked out not to long ago but I finally got my own place
Most Helpful Guys
What Girls & Guys Said
00The only opinion from guys was selected the Most Helpful Opinion, but you can still contribute by sharing an opinion!
Related myTakes
Click "Show More" for your mentions
Most Helpful Opinion(mho) Rate.
Learn more
Learn more
Most Helpful Girls