Suborbital is right. Forget interstellar. Too far to go, way to far. Light years away. Even if you could find a propulsion system before you got any appreciable distance to another star system everything and everybody you left on Earth will be long gone.
Also think what even a 1 gram rock would do to the hull of a ship when traveling at 0.10c. Even if you could detect the object the inertia of the ship would rip it apart during any evasive maneuver
Actually, if you run the numbers (there are web calculators for such things), a trip to Alpha Centauri and back would take you 7 years. "Everybody you left on Earth" would have aged only about 15 years.
The presumption, and yes, I know it's a big one, it requires you to travel with constant-acceleration engine(s) for significant times to speed-up, slow-down for an AC "visit", speed-up for return, and slow-down for re-entry. Also, there is a presumption of a very short AC visit... add more time for the desired length of stay.