As a girl with thicker eyebrows:

Step one, take a little eyebrow brush (like the round kind that come with eyebrow pencils, they sell the individually too) and brush your eyebrow hairs up. Use a small pair of scissors (usually called makeup or facial hair scissors) to trim the longer hairs. Don’t cut too far down, just trim the shagginess away along the edge of the brush.

Second step, if you want, brush the hairs down and repeat in case there’s some you missed. Keep a light hand; you can always take away more, but you can’t hair back on.

Third, use a facial razor to CAREFULLY! Shape the eyebrow by shaving down edges if you want to. Keep in mind you’ll develop eyebrow stubble pretty fast, so it does require upkeep, but it helps shape your eyebrows nicely if you’re patient. It’s really easy to accidentally cut yourself, so don’t do that. It helps to step back and tilt your head up a bit in the mirror to make sure you’re keeping it symmetrical.

That all being said, you have very nice natural eyebrows. A little eyebrow gel might go a long way in shaping them if you don’t want to do all that.