How to hang curtains?

I'd love to see a pic of the area. But, have you thought about hanging the rod above the frame? Or from the ceiling? Either of these ideas will give the window the look of being taller and the room larger.

From ceiling:

How to Hang a Curtain Rod from the Ceiling

1. Measure and Mark. Use a pencil to mark where each ceiling-mount curtain rod bracket will go. ...
2. Install Anchors. Use the power drill to install drywall anchors. ...
3. Hang Curtains. Slide your curtains onto the curtain rod and insert the rod into the mounting brackets.

1: Hang Above the Frame. To create the illusion of a taller window, mount the rod four to six inches above the window frame—or halfway between the frame and the ceiling molding. (But within reason—don't go more than eight inches above the frame or it might look awkward.)

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=2ahUKEwjhzM2l9tjdAhWHwFMKHdoJCH8QFjABegQICRAB&url=https%3A%2F%2Fwww.houzz.com%2Fdiscussions%2F4532058%2Fhanging-curtains-with-a-soffit-in-the-way&usg=AOvVaw3A7caUTVeZe1v0fcCR3irA

A picture would help

Can you go to a local store that has a good selection of curtain rod options? I know in my area Joanne fabrics has so many different ones.

Take a look at the Twist and Shout Curtain Tension Rods. They mount inside the frame and might be a way around the soffit issue.

https://www.walmart.com/ip/Twist-and-Shout-Smart-Rods-Adjustable-Window-Curtain-Tension-Rod-48-84/40719034

Can you purchase a beautiful telescoping rod and set it inside of your window frame?

It's ok just hang as high as possible and mount on wall a few inches beside frames.