Marturo, I too used Picasa for years to import and catalog my photos. Did my post-processing too when I was only shooting JPG files. But in time I started to shoot RAW + JPG, and began using the RAW files almost exclusively. I stopped using Picasa for the editing anymore, but continued to use it for importing and cataloging. But it is old and unsupported now.
I am a thrifty person, so I look for free and open-source software solutions first. I have changed to using the Nikon View-NX and Capture NX-D for the import and cataloging. True it is not an all-in-one setup like Picasa. But the price is right, and they link to each other so you can be viewing photos and click on the button for importing. I do not use Affinity, but have heard some good things. I do my post-processing mostly with RawTherapee (open-source software) and I have learned to navigate it reasonably well. Not for a novice user at all though. I did recently buy Luminar 4 and am using it more regularly. Luminar does have a simple interface, I almost consider it too simple. But I find the AI does a better job making adjustments than my manual attempts in RawTherapee. They are releasing a new version later this year, it could pay to wait for that before testing out.