If we could hit 50% speed of light we could do a fly-by mission in ~25 years. Then another 12 years waiting for the data. Honestly, ~37-40 years isn't bad for an interstellar mission. Remember the Voyager program has been going on for that long! So we already have experience with long space missions.
https://breakthroughinitiatives.org/Initiative/3 https://en.wikipedia.org/wiki/Breakthrough_Initiatives#Break...