Generally, most people can move past the worst heartache of a breakup, including a first love, and see what else life has to offer within approximately three months.
While there's no definitive, one-size-fits-all timeline for healing from a first love, the referenced information suggests a typical recovery period. Lingering feelings may persist, but the ability to move forward usually emerges around this timeframe.
According to research, you can typically see past your heartache and look towards the future within three months of a relationship ending.