Rhita is a very kind person. You can expect great hospitality. She will definitely take care of you and watch that you always take enough water with you, especially when it's hot outside :)
Astoria is a great neighborhood with lots of nice cafés and restaurants and some supermarkets are just around the corner.
The only thing to keep in mind is, that there are no doors to the room you'll live in. There's a curtain though. So bring some earplugs and prepare to be visited by the two cute cats quite regularly :)