Rock guitar includes many tones and effects. Your amp has one tone knob that moved to the right increases treble and left bass. This is the simplest of EQs. You can't add high, mid, and low frequencies, only reduce highs for lows and visa versa. That knob at 12 o'clock would be like having high, mid, and low knobs at 12 o'clock. If the amp has a distortion or over drive control that can be used to get what is called a "dirty," sound from a guitar as opposed to a clean sound. Both are found in rock.
Your little amp can play rock at any setting. A common way to set it is to keep adjusting the controls on it and your guitar until you find a sound you like. Any control setting can be a rock setting as there are thousands of rock songs ranging from the cleanest treble twang to deep dark distortion.
Overdrive and distortion effect imitates an amp with the volume turned up high enough to overdrive the speaker. Distortion effect makes the distorted sound with or without high volume. Distortion without an effect was first was used to get a thick sustain from tube amps for blues. It required a powerful amp with very heavy duty speakers to sound decent. Distortion came to be an effect device, not overdriving speakers, which also became an effect. If equipped, turn up the distortion or overdrive on the amp to get a raspy sustained sound great for power chords and lead.