Some good advice here mate.
Sharing my own experience, the thing that springs to mind is the term 'hanging on by your finger nails'. That is certainly the feeling I had when I did the Airbus course.
You have to respect the fact the course really is the minimum, in terms of your knowledge of the aeroplane and your skill to fly it. I am sure you will meet the standard required, but it is tough and I sympathise with you as I know how it feels.
It is all building blocks mate. Once you have passed your LST, you move into a new area of your career. You have done the type rating, now you have to learn how to operate the aircraft in the commercial world. After a while, you will build an experience base, get more confident and eventually will start to enjoy it, this is where you win the battle of your own self doubt. And believe me it is a great feeling. All of a sudden you are going to work, and really enjoying yourself and you are getting pocket money to make a living, its great.
I wish you all the best, let us all know how you get on.