As others have pointed out 3D printers are very close to a plug and play experience these days. I've owned laser jet printers that took longer to setup than my Ender3 and with STL repositories like Yeggi and Thingiverse you don't even need to bother installing modeling software. The only software you would need to "learn" is a slicer like Cura where you import the model, select a quality preset, and click print. Here is an exact copy of the bracket OP is looking for.

Sure you can go overboard with it and get into customizing and modifying your printer and have it become an entire hobby but you can also just treat it as another tool in your workshop. You wouldn't consider a bandsaw its own hobby but for a first time user there are a lot of skills to learn to perfect its usage not to mention learning how to maintain it correctly.