Can I use a glue gun instead because I can't sew very well?

An iron might leave behind stains if the paper is light colored; try a hairdryer instead.

Yes, but it's not really worth it since you will be adding shaving cream. The lotion, shaving cream, and foaming hand wash will make the glue look white, instead of...

You can use clear glue, or any type of liquid craft glue. If you use a glue stick you will have to microwave it.

Hot glue would not work well for fabric. Fabric glue would work to make the hat without sewing, though the pleats may be a little tricky, and the hat would...

No you can’t, since the whole idea behind a glue gun is the glue itself. The gun is just the delivery system of the glue. A pritt stick won’t glue...

Tape will not last as long as glue, especially a glue made for paper. There's no reason you can't use origami paper, though.

Use bonding web, or iron-on fabric glue, to hold the patch in place. However, since that isn't a permanent solution, you still need to stitch the patch down.