I guess you’d have to learn how to give injections? Su-cutaneous sounds do-able; intramuscular sounds like an actual jab injection. Am I correct?
Pinch the skin and inject just under the skin at a 70 degree angle. Intramuscular is just jab in the arm, thigh, or butt. Subcutaneous should leave a little raised patch the size of a quarter for an hour or so.