Talking, eating and breathing all use the same muscles.

In myasthenia the problems is not so much muscle weakness, but muscle fatigue.

You have to learn how to use muscles, let them rest and recover and then use them again.

If I talk a bit more, I can't eat. If I eat a bit more, I can't breath. I can almost never eat and drink at the same time and many times I can't mix different textures of food. Also, certain tastes improve my swallowing and others do the opposite.

It's a learning process of how to preserve your muscle strength, what makes your muscles stronger etc.

By now I have learned to do it so well, that I don't even have to think about it. Also, missing a meal or two is less bad than choking on your food.
Drinking in small sips gives you the same amount of fluids you would get drinking faster.