Be careful about cracking open the text books and seeding the site with questions that been asked on every other site on the subject. This isn't a trial, demonstration, nor a "call for questions" just to shore up your numbers. This is your actual site.
Please ask about problems you actually have.
Asking the First Questions
When users are suddenly put on the spot to "come up with questions", they typically post the conspicuously-boring questions that have been asked on ever other site on the subject. Ask actual questions about problems you really have. That's what will bring experts to your site.
The questions you ask now will set the tone and topic for a long time to come. Try not to "seed" your site too much or the whole thing is going to start to look staid and forced. That will not make for an interesting site.