What languages & technologies are best for a community website development? [closed]

I'm seeking for some guidance for a solid start in a website project :)

I'm a fresh CS graduate and currently want to try and build a community website that will include a few 'bulletin board' based pages, such as:

• Apartment rents
• Second handed furniture sales
• Classes, courses & private teachers
• Activities

and so on...

*The website will require a registration to use it. And all users can post their announcements.

My questions are:

• What technologies should I use? maybe Django?
• What database would be considered best for this use? lets say for a few thousand users.
• Is there a designated design pattern for it?

Do you have an idea what would be the best combination for this use?

Thank You!