I feel like this is all a bad dream and hopefully I might wake up
If only it were that easy!
You will learn as you go. Learn from your mistakes and try not to repeat them.
Remember, most things that you will be told will work are counter intuitive. It doesn't seem like they should, but trust the vets and everyone else's posts here. When we get the courage to do some of these things and have the patience to wait it out and not expect an immediate positive response, that is when most sitch's turn around. Of course, all sitch's are different and not all can be saved. Your best chance is to listen and do the hard work even when it doesn't feel like the thing to do.