Ear Stretching

El

So I have two piercings on my lobe, and a cartilage on my left ear. I want to stretch my first (standard) hole from an 18 gauge to a 14. Anyone have any suggestions? I don’t wanna go past that, mayyybe a 12 in the future. Tips on stretching? I’m planning on just wearing tunnels, where should I buy tapers? Thanks!