Cooking steak isn't hard if you follow very simple rules .
1: Bring your steak to room temperature before cooking . Do NOT get it straight from the fridge and put it in the pan
2: Oil the meat NOT the pan
3: heat the pan
4: season with pepper before cooking , salt after
5: Rest your steak for 3-5 minutes before serving
a blue steak should be a dark almost purple in colour
a rare steak will be dark red in colour
a medium rare will be a more pinker colour with a little pink juice
a medium steak will be pale pink in the middle with little juice
a well done steak will only have a trace of pink to it
To cook a blue steak it's 1 minute both sides
A rare steak 1.5 minutes both sides
aA medium rare  2 minutes both sides
A medium  2.5 minutes both sides
A well done steak will need about 4- 5 minutes both sides
All the above cooking times  are base on a 2cm thick sirloin steak
I would always suggest using a griddle pan to cook your steaks , no sitting in oil and the charred bars on the steak look appealing