I'm not sure what kind of topology your place has but I've found some good tools online.
They may or may not help you but I'll pass them along.

• First, most counties have a GIS system for all the properties they tax. These should contain water ways and contours.
• Google Earth is a very useful tool to visualize sun exposure for land, especially in mountainous areas. Simply select View → Sun from the menu; then step through the daylight hours so see progression of shadows. Set the timezone to avoid confusion.
• The government weather site has a lot of good stuff. http://www.weather.gov -
• If you're near a flood plane - https://water.weather.gov/ahps/
• If you're concerned about invasive species - https://www.eddmaps.org/ - although we seem to have the most representation here in Florida. ;-)

If you have any favorite links please share with us too.
But most of all have fun!