I understand if you have an autoinjector, you _can't_ do this, but this is how I was trained to give injections as an EMT-B (and paramedic training provided by the Army, as I was an Army medic).
I went down this rabbit hole after being handed a 100 pack of insulin needles and an estradiol vial with zero instruction - seemed irresponsible at first, but it turns out it's pretty hard to mess up.