Well, congratulations on the Quad Man.. the best place surely is Me Said or Wakrah beach to really see what is it made off!!!.

You may enjoy riding it on open big lands (example near Al Sadd Statium or here and there)

Or oppostite to Dasman Hyper Market (A/port rd brnch) lots of rough terrain, this used to be a spectators round for Doha Rally as well.

But please be sure that the noise don't bother the neighbouring with occupied houses/appartment.

I noticed the sound echos more when you have built compound around a large empty space...

All the best...