I am trying to learn French vowel sounds using this IPA chart. My question is about this chart. I use it for the first time and I am interested how comprehensive it is. Does a position at this chart fully "describe" a vowel? With what do I have to complement this chart?
Also the explanation is confusing, for example for a close-mid vowel I read: "the tongue is positioned two-thirds of the way from a close vowel to a mid vowel." How would I measure this two-thirds? Especially it is difficult for back vowels, I don't feel the back of my tongue at all, I don't know how high it is located.
Anyway, any help or additional information concerning this chart is appreciated.