I can recommend you to stay at Angelas Airbnb!
It is located 10-15 min by foot away from the storic centre. You can also take the bus from there to go to the sea, it takes around 45 min.
Angela and her brother are really lovely people, especially when you follow their rules ;)
The apartment is not incredibly luxurious but you can find everything you need (except olive oil and spices when you like cooking), there’s even a washing machine, a mixer and a puree stick you can use.
I stayed there for one month and due to the two other rooms in that apartment I met some really lovely people from different countries.