[BamaDOC]

Agree with @jimcosta and @CapitalKane49p.

those red cross and emt courses give you basic skills which are not very useful unless you practice them.
there is a saying that common things happen commonly...
basic injuries that you may need to treat if medical services are unavailable or... risky (covid filled ers)

lacerations.
cuts
bruises.
fractures
sprains

some good skills to learn as well as medical supplies to purchase...

suturing or stapling a simple laceration...
we have medical students and interns (not much better than a medical student) repair these in the Emergency deparments. there are kits which have needle drivers (a fancy clamp used to hold curved needles) pickups (tweezers), and sutures.
https://www.amazon.com/Needle-Cutti...ocphy=9012570&hvtargid=pla-583471352806&psc=1

you can do similar things with fishing hook removers
https://www.orvis.com/p/scissor-for...osH9kN2B6gIVjIFaBR2UxwfNEAQYBiAB EgIrU_D_BwE
https://www.sportsmans.com/fishing-...osH9kN2B6gIVjIFaBR2UxwfNEAQYCSAB EgLjdvD_BwE

with some needles and thread..
https://www.medicaldevicedepot.com/...zJedkt6B6gIVLYNaBR0Vpwf4EAQYBSAB EgKQCPD_BwE

you can practice on a pig leg or chicken leg.. with the skin on it...
here is a guide on how to tie knots.. sutures
http://surgsoc.org.au/wp-content/uploads/2014/03/Ethicon-Knot-Tying-Manual.pdf

here is a suture guide

how to set and splint a broken bone
how to fix a dislocated shoulder arm ankle etc...

these skills are a little more complex and you really cant learn from a youtube video...
but in the old days... country docs would do this without even x rays...