Pleasant looking home. Like your furnishings. If at all possible, do keep the sofa, even if you need to use narrow floor lamp or floor lamp combo unit in lieu of traditional sized end tables.

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Since your space is small, you might want to consider white painted adjustable louvered wood shutters for your windows rather than drapes or curtains. Alternately, you could choose white mini blinds and a light color swag valance for each window.

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Darker colors and bulky fabric window treatments can make a room feel smaller.

Choose any additional furniture with storage in mind. A wooden foot locker can be used as a coffee table and/or end tables and/or bedside tables. Two drawer wood filing cabinets make good bedside tables as well. Adding castors can increase the height and make them easier to move about for cleaning.

For storage, go vertical -- an armoire/wardrobe can be both a hanging closet for shirts and have drawers beside or below it with a smaller footprint than a dresser with mirror.