There are a lot of folks out there who want to carry first aid equipment but are afraid because they don’t have formal training. Carry the gear! Chances are there will be someone who knows what to do if you don’t. Learn what you can from friends and the internet. Go take a class. Stopping bleeding is not rocket science
SkinnyMedic has a great video on how to treat major trauma or gun shot wounds and walks you through how to use some of the supplies in your trauma kit.
I am a fan of the Trauma Kit Now from Blue Force Gear. Stop making excuses and do what you can now. Get some medical supplies and learn how to use them. Your friends and family are counting on you.