I know plenty of beginners who accurately described and identified colic to me as well as newbies bandaging a minor wound just as well as I ever could have. There's no reason to discredit the OP for trying to be prepared. Also no reason to be condescending, you were new to horses once too.
An equine first aid book is a great thing to have as well as triple antibacterial ointment/neosporin, vet wrap, gauze wrap, non stick pads, thermometer, stethoscope, petroleum jelly, wonder dust, liniment, and epsom salt. I keep diapers in mine for hoof injuries and bandage scissors as well. Make two kits, one for the barn and one for the trailer so you've got something on hand if anything happens when you're not at the barn.
Show me a horseman who hasn't fallen and I'll show you a man who has never truly ridden.