The water's free
I'm relatively new to fly fishing and may not understand the protocol and etiquette that goes with it, but the idea of a beginner "getting in the way" of the experienced doesn't make sense, and may even ring of snobbery.
It all becomes balanced out when a professional beach caster gets to my favorite hole on the surf before I do. I should have gotten there faster. I can't fish at his level but he's still in my way. If a guide wants to eat, he has to get clients. They pay, they play. If they get to a favorite hole first, alarm clock adjustments are in order.
Get the rod, go to the water and cast to to your hearts delight. If you stink and can handle the embarrassment, more power to you. You'll either learn or go get womeone to help you.
The water is free. (Mostly.) I'm going to use it no matter how hard they laugh at me. When I'm finished, it's your turn.
"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats."