Saving full size photos WITH edits

I don't know why there has been nothing to help me. I have been on the internet for 2 hours trying to figure out how to save my photos from Lightroom CC (which I only just discovered did NOT replace Lightroom Classic like I was lead to believe and everything has been stupidly, complicatedly different. It seems to only have 2 options. Save in JPEG or save the original "with" edits you just spent months working on... IT does however save your original files with an XMP file and from what I have been reading, is useless to me. So my main deal is that I just finished editing photos for a wedding and they want to be able to print big versions of their favorite pictures. They are friends as well so I would like to give them the edited versions to print but from what I have been told JPEG is only good for showing online and not for printing. So somebody please tell me that SOMETHING I read was wrong because I need to figure this out ASAP.

PS also I was told that I could convert them to DNG and that was the solution to my problem but I see no option to do so??