Thanks for this post idea Sandrine 
It’s gonna be great to follow you.
One small hitch obviously, the title… Yeah because you won’t stay a beginner 
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You should put your post in the category: musical creation, that way you could also share your progress with us through audios and/or videos (you could do it here but it would be more fitting in the other category ).
And to answer your question:
My answer is: well first of all it’s very unlikely you’ll choke 
but more seriously I’d say it’s simply down to habit 
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The longer you blow (and so potentially dry out your throat) the more your body will get used to it plain and simple.
From my own experience, this dry sensation in the throat is just temporary.
Would you happen to have a little photo of your didgeridoo by any chance, I’m curious.
If that’s the case and you’d like to share it you can do it here:
There’s this other post here: Montrez votre didgeridoo et racontez son histoire - #115 par Karl
Does anyone know how to merge them by the way?
Happy blowing to you Sandrine, looking forward to reading your progress!!