Welcome Kymco Owners!
that hex bolt to the left comes out, that is the pin the pads slide on
IMO, brakes on a machine are among those things you should have an experienced person oversee, for your learning experience.redk
The brake pads will need to be pryed out , I take the calipers off , to clean every thing,. so the lower two bolts in the picture off,. then lift off, the disc,. turn it around to see the other side you will see how it is held in there,