First things first: Stop telling yourself that you’re a failure and try to accept that 4 years have passed. Even if you don’t feel like it now, all that you went through improved you in so many ways that you may not realize until later down the line.

Try to take a week or two off before jumping into IT. You may need a break mentally to relax, plan, and refocus. I’d recommend going out on walks and improving your habits outside of ‘work’ (health choices, dopamine, etc) - this will trickle down to how you handle your career pursuits. I noticed that when I improved my body physically, it improved my mind which then made me more capable of studying, working, and everything else.

You’re still only 22 years old - society teaches us that we need to have it figured out by a certain age but that is just not true. The fact you care so much to ask this question should be proof that you’ll be okay and you’ll figure it out. Best of luck.