I really have no idea what I should or shouldn't do in a CV

Hey. Still looking for my first job. Part time or full time sales assistant in retail or something. I've asked around loads of places for advice on my CV, but I hear so many different things, and I know that different employers will want different things, but that's just left me confused and indecisive on what to do for my CV.

Do I do a separate list for my skills? Do I put it under work experience? Do I bother with a "personal statement", should I put my work experience/education in a little table, if I do list my skills, how should I describe those skills - do I just state the obvious? That seems silly; obviously the employer knows what fucking stacking shelves is, but do I prove it? How do you prove that, it's not like there's an example you can give, that's just the day-to-day business, it's not like it's difficult or anything.

I'm probably just overthinking this, but I'd appreciate any kind of advice really. Thank you.