Don't put your trust in anyone on this forum, including me. You are the key to your own success.
I buy ghee for cooking on high temps. Butter burns every time I've tried using it for that application. Coconut oil is good too.
I haven't read the responses on lard, but I personally I avoid pork fat because IMO it has unfavorable fat profile.
salt and pepper steak and let it come to room temp
get pan (I use charcoal grill or sear portion of my other grill....but I've heard cast iron is best for pan) very hot....I never measure temps, but go by feel. I'm just guessing 700+ degrees.
put steak in for 1.5 minutes (or less for me) on each side. eat this way or finish at lower temp in the oven if your going for anything above medium rare.
K. Thats my story. Just google how to cook steak though and I'm sure you'll find some references.