i started of with the Black surcoat over mail. It feel nice but what about Helmet/shoes/gloves.
Ok, black surcoat over mail is also a good level to be at.
For Gloves I recommend the Mail Gauntlets for moneymaking, or Hourglass Gauntlets for some better protection.
For Boots, as a general rule try and have about the same leg armor as body armor (some people skimp on leg armor, but I don't recommend doing this.). Your surcoat already gives some very good leg armor, so you could potentially go for some lighter boots, such as the Rus Cav boots. For some more general purpose boots you could also go for the Mail Chausses.
For Helmet, I strongly recommend getting a good helmet. A lot of people go for lighter head armor, but that makes you far easier to kill by someone who knows how to target hitboxes. As infantry, don't go lower than the Kettle Helm. Past that, just go for whatever your willing to spend the upkeep on and that looks good.