The capacitor is perhaps the most mystifying component to people getting in to electronics, so in order to keep your mind from melting lets just hammer out a few basic facts to help us come to grips with reality.
a direct electrical current can not flow through a capacitor*
an alternating (AC) current can flow through a capacitor
The capacitor can store a charge and release that charge later.
the physical size of the capacitor doesn’t tell you how “big ” it is in terms of capacitance