Hello and welcome to the forum. Glad to have you here!
My juice is a bottle of standard mixed with a bottle of heavy VG.. I dont even know what VG means.
PG = Propylene Glycol - the "flavor carrier" of e-liquid. A secondary source of "throat hit", but not as strong as the nicotine concentration. Some people have a sensitivity or even an allergy to PG. It's very thin.
VG = Vegetable Glycerin - the "vapor maker" of e-liquid. Used as a sweeter in many food sources, and also as a skin emollient. It's very thick.
PG and VG are often used together in different ratios in e-liquid. For example, a 50/50 PG/VG ratio. Some juice vendors offer a range of different ratios as far as PG/VG.
And my throat always burns.. Sometimes taste like burnt paper
If you are getting a burnt taste (we call those "dry hits"), if usually means your wick cannot pull the eliquid fast enough to keep up with your battery. There are a couple of things you can do:
1. Dial down your voltage or wattage. This will vaporize the eliquid at a slower rate (if your battery allows you to do this)
2. Decrease the airflow, if your tank has adjustable airflow. The decrease in airflow will increase vacuum inside the tank's atomizer, which should increase the flow of juice to the wick..
3. Take a sharp draw (or two) on your drip tip (without engaging your battery). This will pull more eliquid into the coil so that it will be available when you press the battery button and take a draw.
You will get the feel of this over time and develop a sense of how often you will need to do this to avoid "dry hits". The PG/VG ratio of your eliquid also comes into play, as VG is thicker than PG . If you use high VG try adding a few drops of distilled water (per mls of juice) to your tank to thin out the eliquid.