You are super lucky if you have large windows in your bedroom. There are many advantages with having big windows. You can feel the beauty, natural light comes in, fresh air will come in, etc.
If you are more conscious about your privacy rather than outer look then take the best decision whiles working on the treatment of windows it will fix all problems related to it.
Drapes, sheers, and curtains are advised to be used when you have the option to choose the fabric for your window, after doing the window analysis.