The best thing you can do for yourself and those around you is take a first aid course. They are usually cheap or free through your local community college or community education programs, you can get a certification, and it will teach you when you need to seek assistance, and when you can handle it yourself. It’ll also teach you what’s worth keeping in a first aid kit, like butterfly sutures, and what isn’t (those pre-made kits are junk).
Everyone should take a first aid course. It should be done every 5 years ideally, if only because you’ll hardly ever use it, and recommendations do change.
So, if you can find somewhere, give everyone you know the gift of lifesaving knowledge! (As in arrange for them all to take the course with you, you all get the info and a nice bonding exercise. Make all the jokes about when it’ll be needed on you because you are a klutz)
Who knows, you or one of your friends/family may save a life someday!