Should be no problem. You will need a residency certificate from immigration specifically for opening a bank account. Bring copies of your passport pages, dress like you6r on business and your won't have any problem.
it takes one day! Go to immigration in the morning for a residence certificate, have copies of your passport info and you're in and out of the bank within the hour.
Just apply for evisa abroad for non-o. Then arrive on the non-o and you shouldn't have any difficulty opening a bank account to get your 12 month extension at the end of your initial 90 days.