I would go to asla.org and search under ‘resumes’ under the ‘job link’ tab and open as many portfolios as you can handle. You could also take a look at the myriad folios here for layout ideas.
My advice: keep it simple, we’re not graphic designers. Name, date, scale, north arrow (if nec) drawing title, key/legend is about all you need. I like to just leave the background white or blank and let the drawing/design do the talking rather than crazy layout no one will read.
Try to use InDesign or Illustrator to lay everything out..text will be crisper and images should be linked for easy updating..good practice imo.
good luck.