Make use of the Flight Simulator Fuel and Payload function, so that you're not carrying fuel you'll never need or passengers you don't have.

There may be no sign of a landing strip which you are used to with a licensed airfield.  You may only see trees and fields, a few buildings, a windsock and possibly the dreaded electricity pylons and cables, until you get really close.  Make an approach on the runway heading, but slightly to one side of the strip.  Then with luck, you will see two rows of runway edge markers.  By this time, if you are off line, it's too late and you will have to make a new approach. Be prepared to throw away several approaches like this until you get a good enough mental picture of the relationship of the trees, buildings and field pattern to the strip to make a reasonable landing. Or you could to do what real world pilots usually do and that is visit by road and walk the strip wth the owner before flying in. In FS language that means doing a "Go to airport" or slewing to the published latitude and longitude and having good a look around.

Finally check the weather. You should be using vatsim real world weather, so don't try and land if the winds are in the wrong direction, oer force 8!.