No reason to feel stupid! We're not born knowing this stuff!
VG- Thicker, more vapor, mutes flavor slightly, less
throat hit- some cartos and
tanks don't like too much VG
PG- Thinner, less vapor, more flavor, more
throat hit- some find all PG irritating. Cartos like it.
A good mix to start with is 70pg/30vg or 80pg/20vg. Then you can go up or down on ratios depending on what you like/don't like.