Publishing a book?

So I’ve had an idea in my head that I’d like to write a book. A book about my life and life since having a baby. I’ve had post partum depression and would like to write about it all, and the highs and lows of it all and motherhood, things like that. In like a humerous style.

Anyway, I’d have zero idea where I’d even start. Its not something ive ever thought about or looked into before.

How do i go about writing one? Getting it published? all that jazz, i just dont know!