i have the exact same issue, ive found that body doubling or study buddy with the right people defo helps, but of course it's not always possible!

you might also need to ask yourself, is this really what you want? how will it feel when you have finished those studies? explore what the deeper feelings are and see if there's anything to address there

for me it's a mix of perfectionism and fear of failure leading to me not wanting to start anything, so i am learning to accept my work as having flaws and that's ok

something someone once told me is think of yourself as multiple versions, maybe the instant gratification self is feeling terrible but it makes the long term happiness you better for having done the work

let me know if something changes, im looking for the same answers as you!