That's one of the uses cases, some of us were talking for months now...Great to see you start implementing it... Keep it up!

1. What programming languages it is using so people can join if they have experience with that languages?
2. Check out #SteemConnect for integration with Steem.
3. You can store questions directly on Steem blockchain if you will integrate it deeply with extra services (additional db with perks) on top, this project can grow big and help a lot of people.

PS. Let me know if I can be of any assistance to bootstrap or help with integration.