I really enjoyed staying at Denise and Trevor's place. It is located at quiet, something like suburban area and easy to get to city center or metro stations by bus. The room is a lovely little place which has various furnitures & facilities you would need. It is located at third floor but you can get some help to carry the luggage. A bathroom is shared but only with the other guest so it is not that busy.
You might have to learn little things while staying at this place, which is quite typical when you stay at others place, but Denise & Trevor will definitely understand and help you so don't worry.
You can start your morning with some converstations with them while you having a breakfast in the kitchen or wrap up your day when you using some facilities which are allowed to use for guests in the evening. So it may be a good choice for people traveling alone. Also you can get some practical advice from them.
They are very communicative and will treat you very warm and kindly whoever you are, so I think you don't have to worry about Enlgish fluency or shyness etc...! :)