Nicotine is either PG based, VG based, or a mix like 50/50.
I use PG based nic liquid bc most of my juices I make are around 80PG/20VG.
I use the EJuice Me Up calculator and its really easy to use and works great.
Before yhou start making your own juice make sure you FULLY know what your doing. DIY is alot of fun but can be dangerous if you dont know what your doing, and frankly right now it doesnt really seem like you know what your doing. As ANY questions you have, no matter how stupid you think the question might be. Read the DIY stickies too and learn as much as you can before you start.
What is the mg/ml of the nic base your using?