There's bound to be a learning curve with most video software. Videopad is fairly intuitive, and it will only get easier. Stick with the basics.
While building the project, press <ctrl-Z> to go back, step-by-step if you make a mistake.
Back up often by clicking the lined 'hamburger' menu at the top left, clicking FILE, and then SAVE PROJECT AS, with an incremented number or unique name, so as to not wipe out prior saves. (SAVE PROJECT will overwrite.)
This help file should prove useful. You will need a PDF viewer. There's one built into Windows 10 and others, like Foxit reader, can be downloaded for free.
To search use <ctrl-F> which opens a small window at the left-bottom of the page.
If you run into problems, check into this forum with a specific topic in the subject field. Folks are helpful.