If you want to know whats going in the vaping world Id like to suggest you pick up a copy of Subohm magazine , I started to read these guys when I first got into vaping and always found something interesting or useful for myself so hopefully you can also. Check them out here : https://www.sub-ohm.co.uk/home
PG + VG RATIOS
Guide for mixing your shortfills with nic-shots
IF BUILDING YOUR OWN COILS A OHM READER IS THE SAFEST WAY BEFORE ATTACHING TO A MOD.