Hi Craig and welcome! I would suggest you go to support.dronedeploy.com to get some 101’s and search a few keywords on this forum. I bet you will get a good grasp of the basics.
First off, you need a supported device to fly with most autonomous softwares including DroneDeploy and most of them require a DJI drone.
By far the most popular drones are the DJI Phantom 4 Pro V2.0 and the Mavic 2 Pro. These are fully compatbile and cost effective. Some use larger aircraft, but that is not the place to start. A few of us fly with drones that are not supported by the autonomous flight, but we can still process our photos and manage maps in DroneDeploy. I also fly a Yuneec H520 and I know another pilot that is using an Autel EVO II Pro.