Like mentioned, you'd be best off if you could go somewhere and shoot a variety of traditional bows with instructions from an experienced traditional archer.
Your draw and form with a traditional bow may be quite different from a compound. Many compound shooters draw "low" with their draw hand coming back towards their chest, then at full draw they raise their draw hand to their anchor - this is a good way to ruin your shoulder, especially with a traditional bow - draw straight back to your anchor.
Some trad shooters cant their bows, some sort of "hunch up" leaning into the bow - to start with, you're probably best off just standing up straight and holding your bow vertical.
The biggest adjustment will probably be in learning to shoot instinctive, if that's the route you plan on taking. Since you're used to looking for a sight pin, your first instinct will be to try and "aim" with the arrow tip or something. While I think most instinctive shooters are, at least subconsciously, aware of the arrow tip, instinctive shooting is more like throwing a ball - concentrate on where you want it to go. With practice, starting at large, very close targets, you'll progress quickly.
Enjoy the process, it's an entirely different sport than shooting a compound with sights and release.