Obviously, there are different types of techniques for the various cuts of meat. First, you need to learn how to cook to desired temp. Below is a beginners video for that:
Now, for some basics. Always bring your steaks to room temperature before grilling. You can even season them at this time, except for the salt.....that sucks out moisture. You can do it ahead of time, but I don't recommend it for a novice. I always rinse the steaks then pat dry.
Get that grill hot, I mean hot, around 500 degrees. Try to limit flipping the steak over and over, I do it just once. When you first lay steaks down, let sear for a bit then rotate it 90 degrees for those grill marks. When the steak is ready to flip, do the same thing on the other side. Over time, you will be able to visually see when it is time to flip, trial and error and experience. Use that hand test when steak is flipped to get used to noticing the firmness.
Ok, this is what I do on the different kinds of steaks:
Filet Mignon
Believe it or not, I prefer searing mine in a cast iron on the stove and finishing in the oven. This is a difficult steak for beginners to perfect on the grill and I think it tastes better on the stove/oven while basting. Simple salt and pepper for this cut. Best when MR to Med.
T-Bone/Porterhouse
This is my go to for seasoning on these steaks.
It is a very good rub and you don't have to make your own. I rub EVOO on the steaks and cover them with this seasoning. Let it sit until close to room temp. Grill and use hand test. For thicker steaks, you can use a meat thermometer if you wish. Best at MR to Med but do not cook to well. You can turn down the heat when you think it is seared enough for thick cuts.
NY Strip
Any seasoning you want is fine, I like S/P, onion/garlic powder. Grill it as a T-Bone. I prefer Med.
Ribeye(Delmonico or Bone-in is best)
This is the perfect steak if done right. I use any of the above seasonings on it, depends on what I am in the mood for. DO NOT be afraid of those flare-ups for this steak. I put these directly over the flames, nothing better when that fat caramelizes IMO. Cook these hot and fast and try to catch on fire some. If you want a more tender ribeye, cook to at least medium. MR and under can tend to not let that fat and connective tissue render away.
Sirloin
Do not waste your time
Never be afraid to cook on the stove or oven for any of these steaks but grilling is best for most. Experiment with a prime rib sometime. Smoke some ribs or a brisket. Learn the different methods from charcoal to gas to wood. We all have our own favorite ways but always try new methods until you find the one most comfortable with. Try different spices, seasonings and herbs. I will say stay away from wet marinades, they will most likely hide the flavor of a good steak. And for crying out loud, do not douse in ketchup!
There are many different ways to grill, incorporate others opinions into your own and find the one that tastes great to you! Hope this helps, I am not a National steak cooking champion but have been grilling my whole life