Sit down and study. Force yourself, just do the action regardless if your mind doesn't want to participate. It will eventually follow. And at the same time shut out any other possible distractions, such as turn off the TV, no music (or maybe some music if you're that sort of person who works well with that), no internet, put your phone on silent.
Keep a time limit in your mind, like an hour. Your brain can't absorb more than an hour, so after an hour you either stop or take a break for half an hour or so. This time limit will help you because you won't have in the back of my mind "Oh my god I have to FINISH all of this" but instead "I will do as much as I can in 1 hour, then no matter what I'm free. That's all. Just one hour." And that will help it seem less daunting.
Find the right method for you to study, so that even if your mind doesn't want to engage, the method of studying will actually enable you to learn it. For example, I know I am an auditory learner. So if I force myself to just sit down and write everything out, I will not learn because I know it's not what my brain responds to. But instead I make flash cards because I know I will be able to ask myself the questions out loud or get other people to test me on them, or I try to teach it to someone else, so even though I might not be all 'there' when I'm studying, I know it will eventually aid in my learning and I will take something out of it. So do something you know your brain will engage in regardless if you want to do it or not. Does that make sense?
Finally, reward yourself. Have times off, have breaks, have treats, have baths, don't push yourself. This way you take things a step at a time instead of this whole big thing all at once. And by organising it in chunks like this, it will seem reachable and possible and won't put you off.
You are an INFP, you will still stress a tiny bit let's face it. But encourage yourself to keep motivated, know yourself and how you work best, and although we rely on our intuitions and run quickly when we don't feel like facing something, remember to push yourself at times anyway because 5 minutes in, you will most likely realise it wasn't so bad. It is just that initial part we have problems with, and the whole idea of it, rather than the actual act of writing an essay, or completing some sums.
Also, remind yourself why you want to do what you're doing, and how many benefits it will have in the future for you. In the end if you realise you don't have many answers to those questions then you will know you're probably not following the right path for you, and you can decide to pursue something different.
I hope this helps. Good luck
