the best way is with a thermometer,but if you have thin chops this isn,t always the best way.i use the touch method,being in the business for 20 years i can touch a piece of meat and tell you what colour it is,try practicing.well done will be firm,medium will be a little mushy in the centre,med...
dont stand to close when you light it,if you are using actual charcoal?no propane right?i will assume so.
light your coals with starter fluid if you have it.
otherwise use crumpled paper and put your coals on top of it.
light and let the flames die down,let your coals burn untill you see them...