Lots of ways to do this but I am only going to mention two you might want to start with…
I use a Mac. It has a program called Photo. I put my camera memory card in a card reader that is plugged in to the computer. I then open Photo and go to the Import dropdown in Photo. I preview all the images and select the few that I actually want to import…then import them only. The rest I might save in an attached outside hard drive…but I do not want to clog up my Mac with a bunch of images. In fact, once I have further evaluated the ones I import into Photo, I delete the ones I end up not using and then go in and periodically delete the Recently Deleted folder. I try to keep my Mac more than 50% empty to keep my processing speeds up.
From there, I select the few I want to edit in Photoshop. I have a folder on my desktop that is titled ToLRFeb2020 or whatever, and I export them to that folder. From that folder, I then Import them into Lightroom.
or
You can put your whole card worth of photos on your desktop and import them directly to Lightroom from there. I find it harder to sort images that way, but others are very use to it and use it exclusively.
Either way…the ones you want to keep…get them into a file to import to Lightroom and then save all the other RAW files to a well identified folder in an outside hard drive…off of your working computer.
That is it. Aloha.