If you want it to look modern paint the fireplace and doors black ,paint all the trim and wall white,add a cool overhead light ,that should get you started

Remove the curtains. Add white wood blinds. Change out rug for something geometric. That will go well with your modern sofa and will set the color palette for pillows and accessories Modern is glass and metal and sleek and uncluttered. Usually saturated colors. The pink lamp should go in favor of something sleek, perhaps metal or black.