OK, I'm going to offer a few suggestions here. Just for background, my experience is that I was a paramedic for 38 years before I retired last year. I created and taught Care Under Fire courses for law enforcement starting in 2009. I had lots and lots of experience supporting SWAT teams and treating gunshot wounds (GSW) and other trauma in a busy urban EMS system.
Put together a basic first aid kit with comfort items so that you can take care of blisters and minor injuries that will make you miserable and will happen much more frequently than major trauma. Take a stop the bleed class, as has already been mentioned here. You won't figure out what to do in the middle of an emergency starting from scratch.
A good quality tourniquet is a good idea. It is the one thing you can self apply one handed that can make a large difference in survivability. Have a rescue blanket. Hypothermia makes major trauma much less survivable.
If you are by yourself, the odds of you being able to self-treat a major injury (unless you can do it with a tourniquet) are slim. You can keep a less serious injury from becoming life-threatening. As one of the docs that I was most fond of working with used to say, blood only works if it is inside blood vessels. So do what you can to stop any significant bleeding.
An Israeli dressing or an Oales dressing is nice to have, but you may not be able to self apply it to any major injury. If the major injury is on an extremity, a tourniquet is a better choice. If the major injury is to your chest or abdomen, external pressure dressings will have little or no effect on internal bleeding. There is a scene in the movie "Day of the Jackal" where the victim is directed to put pressure on a GSW to the liver to slow the bleeding. What a waste of time.
Quickclot works about 30% better than just regular gauze, but it is not a miracle cure. It is very expensive and has an expiration date. Stay away from the powder. The military retired it after it causes a few near miss helicopter crashes when it got into the pilots' eyes. Rotorwash is a thing if you need air evacuation. You're only going to pack a neck wound or groin wound. It won't do anything to help a penetrating wound to the chest or abdomen. If you don't know how to use a chest seal and have practiced with it, it is a huge waste of time.
The longer you are away from definitive medical care (if you have a major injury) the poorer your chance of survival. Having a ZOLEO or other locator/communicator can make a huge difference. Obviously, there are lots of places with no cellphone coverage - that's where a ZOLEO shines.
SAM splints are a nice to have. They work a lot better if you have trained and practiced with them. Practice is important. When I used to teach the classes, 1/3 of the class was presentation, 1/3 was familiarization, and 1/3 was experiential, using simunitions as a motivator and confounder. Medicine changes if you're getting shot at (hopefully not an issue with this group).