This is how you pronounce a grammatical phone (yeah it’s called a phone).
The air goes from your lungs into the larynx. In the larynx, it meets vocal cords. From there, it goes to the mouth, and from there into outer space as a sound, or phone.
The phonetic air (the air used to make a phone) has two destinies:
1. It goes freely. There are no obstacles in the mouth. These phones are called vowels. The vowels differ only by the position of the tongue. Depending on how close the tongue is to the upper palate, you get high ( /i/ and /u/) or low ( /e/ and /o/). The vowel /a/ is neutral, which means the mouth and tongue do not move at all when pronouncing it.
2. It meets an obstacle. When it does, the phone is called a consonant. There are several ways of creating an obstacle. Consonants are classified by the place where the obstacle is formed.
There are some roles and differences phones have because of this.
1. Vowels always carry the intonation of the word (prosody deals with this). You can not have a word with stress on a consonant.
2. Vocals carry syllables, consonants don’t. There are phonetic groups with consonants only, but they are not syllables. Therefore, the number of syllables in a word is decided by counting the number of vowels. Also, a consonant cannot be pronounced without a vowel.
3. Vocals are always voiced. it means that, when creating a vowel, the vocal cords must be active. With consonants, though, the vocal cords play secondary role, classifying consonants into voiced (vocal cords activated) and voiceless (vocal cords inactive). Consonants even make minimal couples on this. It means that there are (almost) always two consonants that are pronounced the same, but one is voiced and the other one is voiceless.
4. There is no word without a vowel. Sometimes, when there is no vowel, a consonant may take a role of one. This is because the vowel carries the intonation and you can’t have a word without it (unless it’s a clitic, but clitics don’t stand alone anyways. Prosody deals with this). In Slavic languages, for example, /r/ and /l/can take a role of a vowel and carry the intonation.
I will give you some links to read about it further:
https://en.wikipedia.org/wiki/Vowel
https://en.wikipedia.org/wiki/Consonant
https://en.wikipedia.org/wiki/Clitic
https://en.wikipedia.org/wiki/Prosody_(linguistics)
https://en.wikipedia.org/wiki/Phone_(phonetics)
I hope I helped. Peace!