Those earth-like exoplanets are many light years away. They’re not just a hop past mars and we may never be able to reach them (cue people jumping in talking generation ships that we don’t know if we will ever be able to build ).

There are other possible places in our solar system though, depending on how many problems we’re able to solve, notably large water moons of the gas giants

So yeah, systematic, gradually reach farther, moon—>mars—>space stations—> water moons, over a few centuries. I’m sure each step will be harder than the last but we can dream we can grow we can meet challenges …. Until we cant