Making a career change while battling depression

I currently work in information technology, which (long story short) I sort of stumbled into early in life and as it compliments my social anxiety rather nicely (very little interaction with people, if at all, on a daily basis) I've stuck with it for much of my adult life.

However, doing a recent evaluation of my interests, I've learned that's not what I actually have a passion about. I'm good at it, but I have no interest in becoming better at it, or learning more about new technologies, which is a bit of a death bell for future career progression.

What I do want to switch to is medicine, in particular, a focus on nursing within internal medicine/gastroenterology.

Just thinking about this is unfortunately absolutely overwhelming and almost like a knock on my back with all of the feelings of not being good enough, change being hopeless, and generally feeling locked in a field I've been in for a decade now. It feels like a far-off mountain towering over me, and my feet are meanwhile locked deep in cement.

How can I work myself out of these feelings/thoughts and generate the motivation necessary to make the switch without being defeated by depression before I can even take a step forward?

Can you take a baby step that would bring you a step closer to your desired career, like an evening class or attending a conference relating to the field? Sometimes if the step is small enough, those internal voices that try to defeat you don't notice what you are doing, at least in my experience!

in the same kinda boat been in the same boring profession for years and unemployed for years to with depression and other mental health problems so i have been saving up my money and in the new year im doing some courses in my local area and im hoping this will be enough for me to find a new profession to work in

I think hvert's advice is good. Do go to a few seminars for nurses (anyone can attend if they pay/might find a freebie) to see what it feels like to be around others in the field. Take a class to see if the interest continues (I suggest a hard-core one like Anatomy&Physiology--with your social anxiety, this might be more appealing than the classes where there may be role playing etc.---you can work up to that) Know that nursing school is not easy, I don't mean academically so much as emotionally, you have to keep your long term goal in sight. And know where you want to go (eg: to continue on to a Master's level so that you can be a clinician/researcher/teacher...)----
I did nursing school many years ago in a state of extreme depression and anxiety----& I did well ---I had already been working in health care which I am sure helped me----I also ended up with a good group of students & we supported each other throughout.
GOOD LUCK! (One of the more difficult things I recall is learning to ask people personal/intimate questions to gain a good history/working base----it got much easier over time)

ps: I also had a T. to talk to the whole time I was in school, and deliberately kept going till I was done with school.

A single class sounds like something doable; a familiar setting to start slowly building confidence in the subject matter. Thanks for all the comments.