I'm not making a moral judgment. Just saying how it is.
Someone else may give you a more wordy explanation but it will boil down to what I said.
You would need to prove immediate need to get your share early.
You would need to make a family provision claim.
This is normally done through the Supreme Court ($$$)
You would need to prove that you were going need the money sooner than 3 years.
ie, need an operation etc.
Sounds like your an adult, so I cant see 3 years making much difference to your financial acumen. As opposed to a 20yo with a habit.
The big problem is it could easily cost YOU $50K to get the money early.
Over riding a will is a big deal.