FTM trans people what was biggest culture shock when it comes to being a man

The reason I ask this because I want to understand what the male experience is like for someone who was once seen as a women and if there were things that you wish to have known before you transitioned to make things easier on yourself

So FTM people what was the biggest culture shock That hit you if there were any

And I apologize for any grammar mistakes English may be my first language, but I was never good at spelling