I am aware of the fact that there already are thousands of dream catcher tutorials on Cut Out + Keep so I'm only going to explain how you can add beads.
I'm using my dream catcher as a necklace. In a few days I'll be flying to Spain for a holiday. I really enjoy flying so I added an aeroplane to combine two of my biggest loves: planes and sleeping.
NOTE: For the tutorial I used big beads so it's easy for you to see what I'm doing. I'd recommend using small beads and a needle. I used crimp beads because they are nice, shiny and have big holes.
I made some stitches first.
Put the string through the bead and flip the string over the stitch.
Put the string back through the bead. Make sure you keep your stitches tight. I couldn't do this because I had to take pictures.
Repeat step 3.
And step 4.
And so on.
With small beads it would look like this. You can decorate it more if you desire. I added tassels and an aeroplane.