One aspect of magick rites we have some topics is about pronounciation.
Well, my main language is portuguese, so Latin, Greek, Italian and even Hebrew names have some better sound and more related with my main language.
A simple sugestion is watch some movies at Youtube to get an idea about the language even if you don't understand it.
Phonetics study help too. Any good dictionary present the phonetic spell for each word.
But remember an interesting aspect, and we observe this with time: the spirits may understand translated text to your own language. If not, how they may get what you are asking for?
Ok, PGM have a lot of barbarian names, so tell it the better you can. It will work and as you do to improve your learning, practice always is the better.
For sure, using the original words works even better and why? Simple. Think you have a guest and he will feel pleasured due your work to make it better. This work is an offering too, it add energy to your ritual!
The dreams oracle will work. Do as you can, they will work.
What fear for? Monsters at dreams?
Sorry, sometimes they happens and some can be really very bloody and ugly but usually you will awake before pissing pants and attract some demons to fuck your life for until you remember to do a cleaning bath.
Well, some need more than a bath... be ready to run to your temple room and do banishings... I'm serious, I have done it sometimes....
Don't mind, with time and practice to lucid dreams you will be able to go faraway and learn a lot .
Remember to always ask for spiritual partners to protect you at that realms and for clear replies to your questions.