When will toddler calm down?

Hi everyone,

My toddler is 2.65 years old and he seems to be getting more wild. Some things he does:

- pulls brothers hair

- hit family when upset

- tantrums when he doesn’t get what he wants (like if we are out when he doesn’t want to leave somewhere)

- generally defiant - says no to everything we ask him to do

- ignores us when we ask him to do things

- won’t sit still when I try to teach him preschool concepts

- climbs everything

My first son is more calm. I’m sure he did a few of these things when younger and it passed without much notice since it wasn’t as frequent.

Did anyone have a toddler like this and how long did it take for them to grow out of it? (Or did they stay like this?)

Any info is greatly appreciated!