Needing to rename a LOT of image files. Repeating names is not an issue as they were given numbers at the beginning of name and are all unique. What I need is to delete all the unnecessary mess after the initial number sequence.

8274 Blah whatever unimportant_trash.jpg
Needs to just be
8274.jpg

I know powershell will do this, I just don’t know how to code it, because I don’t code.
Just need to remove everything after the initial space in the file names.
Also, talk like I’m a coding idiot, because…well… I just don’t know code speak. Reading all the forums isn’t getting me anywhere.
TIA

Any codes I have found don’t do what I need and I can’t get it to point to the folder I need either.