A good start for many would be to enter wound care in the search box on You Tube. Some excellent presentations from professionals. Or you can just buy some tourniquets and a jug of super glue and go full bubba.
mike r
Improper use of a tourniquet could cost a limb or worse, kill your patient, if you don’t know how to properly use one.
I’m a good field medic. I even carry a 5 mil bottle of Lidocaine for suturing. Mucho better than saying “here, take a long pull on my whiskey flask and hold still”.....Grins 😎