Assuming a small car will be big enough for your needs, we would suggest looking at the Toyota Aygo X or Honda Jazz. Both have an excellent reliability reputation, have hybrid engines (in the case of the updated Aygo X) so are quiet when driven sensibly, and are spacious in the front seats which should make getting in and out a simple process. They're both easy to drive too and their compact size makes them easy to park. If access is a key issue we would suggest trying them yourself to ensure the seating position suits your needs.