2. We want to rely on vowels
Vowels serve as support for our speaking. What we want to do is to feel that support.
For this, we want to do the "balloon" exercise getting a bit tense and then deflating like a balloon, letting air go through our loose and relaxed mouth.
We also want to play with detaching the consonants at the beginning of the word. Trying to feel the support that we get from the vowels. Then we attach the consonant back in a reduced form. We don't want to give too much attention to the consonants.
Any kind of singing practice, belly breathing, any exercises developing our diaphragm muscles also work great.