Unlike some other manufacturing tools, 3D printing is certainly easier to get started with and as the technology has matured it has become more accessibe. How easily you pick up 3d printing will certainly depend on the printer you use and material you want to print with and we find this is a good comparison between kit 3d printers and desktop 3d printers.
Desktop 3d printers are designed as a tool to work out of the box with little modification required and the software included is generally tuned for the printer. Kit 3d printers typically require a higher level of knowledge to start printing, requiring the user to understand the mechanics behind the 3d printer and more tinkering / modifications are required. Slicers provided with kit 3d printers are generally generic so users will need to create their own printer and material settings from scratch.
If you are interested in the 3d printer as your hobby, the kits can offer a great platform for modification and customization and tinkering. For users interested in a tool to print parts, we recommend avoiding kits as desktop 3d printers are certainly the easiest way to just start printing out of the box.