I'm from Ireland and we don't pay taxes on gambling winnings here, and I don't know anything about the tax system in Norway, but I have worked in a tax related job in Ireland.
I would immediately hire a good accountant, they will probably be able to save you far more than what you spend on them.
There is likely a way they can reduce the amount of tax you have to pay, it is possible that you can offset some of your gambling losses against your taxes against your taxable amount, they will be able to review your income and expenses from every angle and advise you on the correct amount to pay.
Some accountants will advise you on how to avoid tax completely and their duty is to you and not the government. They should keep all your questions confidential.
This is a question for an accountant and not a gambling forum.
From what I know of European law, ALL transactions over 10k must be reported to the government by your financial institution (I know for a fact this is in revoluts terms and conditions), also combined transactions totalling 100k must also be reported. You will not get away with doing this through a European bank and especially without the help of an accountant.
Also! Obviously put loss limits on the account of about 10 so you don't spend everything.