Quote- 

Now, practically even better news than that of short assignments is the idea of shitty first drafts. All good writers write them. This is how they end up with good second drafts and terrific third drafts

Response-

Drafts are all very crucial to writing a good Final piece. You need to start somewhere and put all your ideas down and get your thoughts out. A lot of people don’t write drafts and that leads into their writing to be not as good as it could be. Drafts help you add more and do more too.

Quote-

it’s not like you don’t have a choice, because you do — you can either type, or kill yourself.

Response-

This quote is saying that like the writer has one purpose to fulfill and that’s to write his pieces or to not do anything and its his choice. He doesn’t actually mean he will kill himself but it sorta means that he would have no other purpose if he isn’t writing.

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You just let this childlike part of you channel whatever voices and visions come through and onto the page.

Response-

I agree with this because you can literally write anything on the first draft and make up anything as long as you make sense to yourself because nobody will see it.

Quote-

For me and most of the other writers I know, writing is not rapturous. In fact, the only way I can get anything written at all is to write really, really shitty first drafts

Response–

He is basically saying that writing really bad first drafts are the key to writing really good final drafts.