The best way to learn how to use the trail cameras is to buy a less expensive camera, read the manual, and set the camera up in your back yard and test/play with it. It won't take long to figure out how to aim and use it. You will also see what is prowling your yard after you go to bed. There are some very basic cameras that sell in the $30 - $50 range online, Walmart, etc. Now is a good time to get good deals.
When a trail camera snaps a picture, that picture (data) is written onto a SD (Secure Digital) media card. The SD cards come is varying capacities, write speeds, etc. They are cheap. Buy two cards for your new camera. That way after your camera has been in the woods for a while and you go there, you can turn the camera off, remove the SD card that has the pictures on it, replace it with the second fresh clean SD card, turn the camera back on and leave it to continue working. Take the first SD card home or wherever and look at the pictures on your home computer, card reader, or whatever. Facing the camera in a Northerly direction is generally considered to be best when possible. That keeps the bright sunlight from shining directly into the camera. I like to place my cameras whereas the critters are not looking directly at the camera when they pass by. It is much less noticeable that way.
There are three types of trail cameras. Those are: White Flash, Infrared Flash, & Black Flash. (1)White flash pops a bright white flash at night when the camera is triggered. Those were the first trail cameras, still made and used today. They worked good and produced great color photos at night but the sudden bright flash tends to spook some critters. Once deer get used to it, no big deal. Not good for coyotes. (2)Infrared Flash cameras flash a very dim split second red flash of infrared light when the camera is triggered. You can see the red flash at night if you are looking directly at the camera. I have had deer and predators notice the light but they may have spotted the camera first. (3)Black Flash is an infrared flash but it cannot be seen so that is best to not spook or alert critters.
I always recommend to check out the cameras and information on the Trailcampro website. Lots of useful and helpful information, reviews of current cameras, etc. there. If you order/buy from them, they give you a FREE two year warranty and a FREE SD card for the camera. They are at: trailcampro.com
Hope this helps, Dave
This is a night time picture from a Cuddeback white flash type trail camera.
This a picture from a Browning Strike Force infrared camera.