I have always thought that although the type rating will be tough, there is a couple of positive aspects to it which I have imagined would be of some comfort - however I'm just about to take my IR so I'm only speculating
1. You've got through most of the hurdles and have a job. This is a very good thing!
2. For the first time since starting all the training, things are becoming specific to a particular aircraft and operation. You won't have to remember things in general terms it's all going to be applied and relevant to what you will be doing.
I know it's easy to say when I'm not the one up for it but I would try to enjoy it and take a look from outside yourself - what a sense of achievement to make it this far and even more so once you complete this part!
Good luck!