Um Aboodi, firstly mashaAllah, congrats
Secondly, I have never lived in Riyadh, but I do hear that things there are not as bad as people say... JO can give a mre realistic idea of life there? I have a friend who is a teacher there, and she loves it! She is single, and has an apartment there...they also have a driver etc, so moving around is not a problem.
As far as I know, she covers her face there. I have only been to Makkah/Madina/Jeddah, and recall in Jeddah that some women did not wear niqaab, just the abaya and shayla.
I have a few online contacts. Will IM you with details. they are western women who live in the kingdom, and may be able to help you inshaAllah.
Keep well. Dont forget, despite anything else, Istikhara is the way to go about these types of decisions. I pray that Allah swt will make it easy for you and bless you with the best in whatever He swt decides is best for you.