noob questions

sorry for such a basic question but i need to know if this stuff will go together i don't want no explosions i kinda jumped into this a bit too fast because i ordered stuff then started to wonder if it will even work together since i was sidetracked researching other stuff about it Tesla WYE...

So I inherited a vape, and had a basic knowledge of how it works but generally didn’t fuck with any settings when I first got it. Well, I decided to try some new coils and wanted to change the wattage. Long story short, I ended up changing a shit ton of settings and now my vape tastes like ass...

Vg and pg which is thicker? I alway thought pg was the thicker. And can one mix with out pg if they are willing to wait?