The T-38 is a small Soviet scout tank. It is fast and is armed with a single 7.62mm DT machine gun and serves best in the role of infantry support.
― Heroes & Generals
The T-38 is the weakest tank in the game. Stick to suppressing infantry and try to stay away from enemy tanks completely.
T-38's main DT machine gun has very limited elevation and depression.
T-38's upgraded AP ammunition allows for more damage and slightly more penetration, which will shorten your time to kill on soft vehicles. However, it still isn't nearly effective enough to engage tanks.
The T-38 is amphibious so it can sail through water. Try to use it's amphibious nature to flank enemy units, or perhaps even as an amphibious troop carrier to attack capture points across rivers.
As a starter tank, the T-38 is insanely cheap to spawn and has a rather short respawn time.
Killing player-controlled infantry with the T-38 will give you experience for the tank assault ribbon (needed to unlock better tanks). This trait is only shared by starter MG tanks.
T-38's weakspots are generally located on the left side of the tank. Try to hide them from incoming fire may increase survival rate.