Most banks are now not opening accounts for people with tourist visas at the moment - you may find it is possible if you take a family member with you to their branch ( I am guessing they have a bank account) as a sort of backup as this may make the bank see you more favourably Good luck
I flew ( short trip with light carryon luggage only) 7 weeks after my knee replacement with no issues Up to you but easier than trying to extend in person from what others have said.