Hi! Glad to hear you like the game.
From left to right, these symbols are: Tissue Health, Structure Health (bones), and then the 3 shields represent armor rating against Slash, Blunt and Fire damage.
If you hit and hold Ctrl, that should display enemy preview window, same one as the L mode shows and it will usually try to show you the last enemy you hit, or closest enemy. If you keep pressing V while holding Ctrl, it wil cycle through all visible enemies.