VFX/After Effects Tutorials

Hey! I have recently being getting into VFX recently and I've seen tutorials on youtube for how to use tracker in after effects, but when i do it, the "Apply" button never shows up? So pretty much can anyone give me some advice as far as VFX goes, and does anyone know of any good websites, or youtubers that do good tutorials on after effects or VFX that I could watch?

-Frank
 
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