Where to start?

So... what I did was I printed my manuscript. I gave it to my grandpa for Christmas (backstory: he has terminal cancer. It was my first novel. Let's not talk about that.) So he got to read it before I did. It was very difficult because I wanted to read it so, so badly. But now I have it back and it's been hidden in my cabinet for a week. I don't know what to do.

Do I read it through?

Do I not read it through but work my way through and edit the grammar? (Probably not a great idea. I have to do so much plot re-working, I'll just make more grammar mistakes.)

Do I pretend it doesn't exist and try to think about my plot and fix it in my head?

Do I go through and split it up into chapters? (That's right. It's one straight shot-no chapter breaks, page breaks, not even paragraph indents.)

I'm so confused. >.< I used to be desperate to read it. Now I'm terrified and reluctant.

You can fix what you don't even look at.

There are as many different approaches to revision as there are people revising. There is no wrong way to start. At least do something.

Take it out and start reading. If you see things you want to change, make a note in the margin. Mostly, though, just start reading. As you go, just go with your instincts about what to work on. After a while you will feel more comfortable and it won't be so scary.

The main thing, is get started on something, the longer you wait, the harder it will be to get started.

Now, open the cabinet...

I read it and make notes, doing some cleanup as I go. If a chapter at a time is easier, do it that way.

Like writing, editing is one of those "whatever works for you" things. Just stumble your way through, try a few suggestions and figure out how you want to do it.