Lightroom Classic (LrC) is a multi-faceted application with seven modules, so more like seven programs in one! The heart of the application is the Library Module, this module allows you to keyword, mark, export/import (although you can do the export/import from other models, too), see your computer's organization of your folders, and find images by any one of several filters, including metadata. You will be using this module to import (think "link") your images into LrC to process. Learning how the import panel works is key to understanding where you decide to place your images. Reading about the Library Module in the Adobe Help manual, found on the Adobe website, is a good place to start. Martin Evening, as someone else has said, has a very good book on LrC and he was part of the group that wrote the program. If you only want to process one image at a time and do nothing else with it, then learning PS would be the way to go for you. I've used LrC for 8 years and it makes my organization and processing so very easy: I can go from LrC to PS and other software with an image and then place it back into LrC to access as I need it. I think if you were to learn about LrC and what you can do with the software you might be a convert to using all of its functions.