Here is a practice I did in ZBrush to learn the interface. I used a skinless zombie creature that is recurring in my art.
This is a Modo render of a special forces operative influenced by content from S.T.A.L.K.E.R., M.A.G., Call of Duty, and Escape from Tarkov.
This is a ZBrush Render of a power armoured soldier inspired from a mix of Resident Evil's Umbrella Corp. troopers, Killzone's Helghast, Warhammer 40K's Death Korps, and a dash of S.T.A.L.K.E.R. and Metro 2033.