Cut/paste from another thread I just replied to yesterday...
Welcome to mixing - I held off doing it for over a year and can't believe I didn't get into it sooner!
I like
@wllmc and Mama J's Juice for flavorings only, and
@Roundhouse with Bull City Vapor for the whole sheebang - flavors, nic, PG/VG, bottles, mixing supplies...though PG and VG can get expensive to buy in small bottles and to ship due to weight. Another site to check out for your bases is Essential Depot, I picked up 2 gallons of VG for less than $50 shipped when they were having a sale a while back - even though BCV is great on price for flavorings and supplies and served me well with a few 450 ml bottles of base to get started, it would cost almost that much to get a half-gallon of base shipped cross-country...