I'll just warn you up front, this is a cheerleading post.
Go you, Rah Rah, and so forth.
To write, and especially to revise, one needs encouragement, and that's mostly going to come from yourself, from your drive to see things through, when you're sitting alone with a laptop or a notepad, and absolutely no clue how to write your way out of the problems you made for yourself by starting on this manuscript in the first place.
I'm not going to say "don't get discouraged", because that's not really possible, is it? That's like saying, don't get frustrated, don't get angry, don't get sad. Those are just your emotions. They're gonna do what they're gonna do, after all. And we have to have emotions to write! Emotions are gold.
So, go ahead and get discouraged. Take a minute to wallow. Then remember what that feels like, so you can use it when your MC faces the worst, most disastrous moment of his or her story arc, and must find a way to carry on bravely anyway.
You can do it.
After all, if our characters can survive all of the horrible ordeals we put them through, certainly we can make it through telling their stories.