Fellas, we, the human race, will not be visiting any extra solar planets until we, the human race, has progressed to a Kardashev Type 1 civilization or a little further to a Type 2 level. Until the scientific community creates a technology that can turn energy into matter, we, the human race, are staying put within the solar system specifically within the inner planetary system.
By having the means of turning raw energy into raw matter, the scarcity of natural resources will be eliminated. Vast construction projects will create the future of tomorrow envisioned by artists and scientists of the last century.
After achieving that small feat, the next step will be creating a power source greater than the energy output of a star and beyond.
Then, the easy parts will be a ship, propulsion system, and shielding. Piece of cake work there.
The final act of this adventure will be creating an artificial gravity/interial dampener system. Why accelerate our future heroes off to the "Goldilocks Planet" if they are turned into goo on the back wall of the room they are in at the instant of ignition? Plus, they need to be walking around under gravity to keep them bones strong.