Wait until you find out you can change which directory screenshots save to. I have a dedicated "screenshots" directory in my home directory. And then a stack in the Dock for it similar to the one for the Downloads folder.
(Also, try hitting space a couple of times in that mode.)
`defaults write com.apple.screencapture show-thumbnail -bool false`
After you’ve done that it won’t be saved, which is great as you can quickly snap and use a screenshot without having to switch to the Finder - and the desktop doesn’t get cluttered with hundreds of images.
What I found you can do instead is use Cmd-C to copy it and then paste it into the app. That generally works.