Another idea I forgot to share it potentially just creating a worksheet that you can send to a printing company for paper forms. There’s tons of printing companies which you can just provide a PDF or even just a logo and some info and get a custom pad of paper printed with that, so it’ll have your logo and the fields you need then just rip off each sheet after it’s written out.

Otherwise if you really need this info digital, a spreadsheet or something in saltcorn is probably your best bet, but really you want to keep it simple at the scale you described (hence the custom printed pads of paper idea)