Stars like our Sun are continually forming throughout our home galaxy, the Milky Way. The Atacama Large Millimeter/submillimeter Array (ALMA), located in the Atacama Desert of northern Chile, is currently the most powerful radio interferometric array on Earth. With its unprecedented sensitivity and resolution, ALMA allows us to observe star-forming regions in extraordinary detail. In this talk, I will present our ALMA observations that reveal the earliest stages of star formation with exceptional clarity. In particular, I will discuss our findings on accretion disks and jets around forming stars and explore the physical mechanisms that govern their formation. These accretion disks are expected to evolve into protoplanetary disks, where planets eventually form.