A friend told me he couldn't write books and what would be the point anyway.
I told it does not matter if you know how to write, to write books (look at me, I said :-) )
To write you need something to be passionate about and be crazy enough to believe you can change the world for the good.
And spend the time writing down how that can happen.
Grammar and style comes after that in importance.
And never think you will be successful (as most probably you will not). With 1 million new books every year, chances to win are similar to those winning a lottery.
He said he will stick to the lottery for now...