Yes, we definitely need to see the fireplace before commenting! Actually, magnolia is a classic and maybe you're best to add colour in your furnishings/accessories, as you have with your new curtains. We need to see the furniture etc. as well. So glad you decided to consult with us on Houzz. It's such a great resource. Welcome :)

Painting wood flooring not recommended for high traffic areas.

Could you hang the mirror on the back of your door? You may need to get stronger hinges to cope with the weight. As for paint for the drawers, either the same colour as the wall or the colour of your existing furniture and decorate as the previous commenter suggested. God luck with it. By the way . . Very neat bed-making there .

I'd go for a warm light grey picking out the colour in the stone fire surround - have a look at Little Green Paint company's Portland Stone it comes in three depths of colour and looks beautifully restful. Then dress it with natural plants!