As crip said.......you really are starting out as a no-go at this station.
Ranger School is the equivalent of SFAS.......SFAS is just in a shorter time frame.....combine SFAS with Phase I SFQC and you will arrive at your goal. Almost. Then you still have Phase II and Phase III, not to mention SERE and then Language School.
The medical aspect that you want to learn is a very very minimal part of the training you will need to accomplish.
What have you shown, really, that would make us want to have you by our side, shooting over our shoulders, us knowing that if we get hit, you'll carry us to the rear, treating us on the way??
Point is, you haven't.
Reevaluate....establish a 25 meter target, and let us know what that target is......
You will not receive any attaboys here for failing Ranger School. You will not receive here any attaboys for failing SFAS.
Find a short term goal, take the RIP slap in the face, and get your shit together. Grab your nuts, sign the line and get on with it.
The folks you're talking to here have been where you are and have OVERCOME all obstacles on their way to becoming Green Berets.
Do PUSHUPS. STARTING. NOW.