hmm I don’t know your skills so it’s hard to give you a guidance - fluent in javascript can mean anything, and for example, being a full stack developer doesn’t benefit much when you implement special effects. And there is no such tutorial for “making invisible effect” out there (or maybe, who knows) as this requires quite specialized techniques from different fields.
It’s going to be very difficult and frustrating if you aim straight to create such effect by starting from learning computer vision and shaders simply because it takes time. I would recommend first, forget about the effect, look into examples on ml5.js to see what’s possible and try to make something fun to get used to it. You can also check out their discord and ask questions there (you can ask here as well, but I think there’s a better chance getting more replies there for ml5 specific questions).
If you get the idea of ml5.js and bodypix, perhaps you can start combining shaders (GLSL) to add effects - but if you want to make it “realistic” you need to learn techniques like physically based rendering and Fresnel reflection. Working with shaders is whole another topic and this can be very confusing too. There is always more “fun” (and often refreshing even if you are already familiar with shaders) alternatives like Hydra, which can make similar (but fake) effects in a much easier way.