Editing a mp4 file


I have a DVD of all my 8mm Cine films. I have converted it to MP4 file and it loads into Shortcut without any problems. There are a few frames that need to be deleted and I have watched all the utube videos but i can’t get any further than pasting the file into timeline. Could some kind soul please give me some simple instructions on how to proceed.
Thank you,

Have you seen this video?

It demonstrates how to remove parts of the video in the timeline.

Many thanks Brian I’ll give it a try. Regards