I’m going solo to Portugal in May and will stay in Lisbon for about 6 of my 12 days (haven’t finalized an itinerary.). I’m looking at Airbnb’s but am not sure which would be the best neighborhood for me. I’m a spry 79 but don’t do hills and steps as well as I did the last time I visited Portugal (1970). So would Alfama be out of the question? I generally like the old neighborhoods. I will be going to museums and other attractions; nightlife is of no interest. Any suggestions would be greatly appreciated.