How do I make a Jewelry hanger for my closet?

Here's some ideas:

https://www.hometalk.com/diy/bedroom/organizing/jewelry-organizer-29158974

https://www.hometalk.com/diy/anthropologie-knob-necklace-organizer-453659

https://www.hometalk.com/diy/bedroom/organizing/diy-necklace-organizer-28586786

https://www.hometalk.com/diy/bedroom/organizing/easy-decorative-ways-to-organize-your-jewelry-2864109

https://www.hometalk.com/diy/bedroom/organizing/diy-necklace-holder-out-of-cork-board-and-fabric-10506535

https://www.google.com/search?q=diy+jewelry+hanger+in+walk+in+closet&tbm=isch&tbo=u&source=univ&sa=X&ved=2ahUKEwi45LDsmLbeAhUFc98KHQsNA_IQsAR6BAgDEAE&biw=1536&bih=740

what about something like this with knobs? https://www.charlestoncrafted.com/2018/06/18/quick-diy-wall-hooks/

purchase a cork board, screw on cup hangers, hang necklaces, bracelets. for earrings get a plastic box with small square dividers and arrange by color and keep in a drawer. shoe bag on the back of a door you can't see will get the clutter off you closet floor. I live in a small space, this helps a lot!

I see you’ve been sent lots of options. I have made several necklace displays. I take a large frame at least 16” X 20”. I cut a piece of cardboard to fit inside the frame. Cover the cardboard with cotton batting and fabric. Pulling the fabric tight and using hot glue to secure to the back of cardboard. I usually paint the frame to coordinate with any fabric my clients have chosen. Then I hot glue a wide strip of ribbon or cording to border where the frame meets the fabric. Then simply use pretty pearl top pins to display your necklaces. You can embellish the corners of your frame if you’d like with paper, burlap, or silk flowers.

I use a key rack that has cup hooks for my necklaces. It is on the wall behing the closet door so no one sees it but me. I bet you could find a decorative one if that is important to you.

I used a tension rod and decorative shower curtain hooks.

Here's a post that might help you https://chascrazycreations.com/how-to-organize-a-closet-with-these-tips-tricks-and-hacks/