Keep it simple to start. Mixing PG/VG, cutting nic, making custom blends...turns a lot of people off to start.
I used to vape 24mg 60VG/40PG. So I buy 24mg 70VG/30PG base. After I add 10-20% flavor I end up with 20-22MG and 54-63% VG since the flavoring knocks down the percentages. Believe me...you can't tell the difference between 54-63 and pure 60. I don't think most juices are that accurate.
Doing that to start really simplifies life when you are trying a lot of flavors. No cutting, no blending...just add flavors and vape.