Hi there

Making scenery isn't the easiest and takes alot of time, patience and commitment to do.
It also depends how realistic you want to make it, like whether to make custom photoreal buildings or use default or pre made buildings and objects.
I have had a go at it a few weeks ago and found it quite difficult (maybe its best if I leave it to the experts

)
It would be best to read tutorials on how to design scenery as this is probably the best way of learning.
I used Flight Simulator Scenery Creator (which is avalible freeware) by Leung Software for the placement of the buildings and objects.
This program is pretty good considering it is freeware. An alternative is to use something like
Runway 12 (freeware) or
Abacus EZ SceneryTo make custom buildings, a program such as GMAX or Easy objects would be required. Good luck anyway
