Traveling between stars at sub-light speeds would require incredibly long journey durations, potentially spanning tens or hundreds of thousands of years. It is currently beyond the scope of human lifespan to undertake such interstellar voyages.
Assuming we develop advanced propulsion systems in the future that allow for sustained sub-light speeds, it would still be a tremendous challenge for humans to live long enough to complete these journeys. The distances between stars are vast, and even with advanced technologies, the time required for interstellar travel would be measured in decades, centuries, or even millennia.
While humans have made significant progress in extending life expectancy through advancements in medicine and technology, it is highly unlikely that we will achieve the ability to live for thousands of years in the foreseeable future. Therefore, it remains improbable for an individual to live long enough to complete an interstellar journey at sub-light speeds.
However, it's worth noting that there are theoretical concepts, such as generational ships or crew rotation systems, where multiple generations of individuals could be involved in an interstellar mission. This way, descendants of the original crew could potentially reach the destination even if the original travelers themselves did not. Nonetheless, these ideas involve significant societal and logistical challenges that have yet to be overcome.