Pretty sure there's nothing to land on with Jupiter. It's gas right? Would there be anything solid to land on?
Which planets could we safely land on right now, if we could theoretically get to all of them?
You theoretically could land on Venus since it is a rocky planet like the Earth, but with the temperatures and acid clouds, you'd burn up in the blink of an eye.
Mercury is similar. If there was a way to bypass the temperature restrictions, you theoretically could land on the planet. It's just nearly impossible given the proximity to the sun.
Mars we obviously can land on, and are estimated to send a man-mission there in the mid 2030s IIRC.
Jupiter is an extremely irradiated planet. You can land there, but you wouldn't last very long. There are talks about setting up space stations in orbit of Jupiter in order to harvest the vast helium supplies in their atmosphere, but that's something that likely won't happen in our lifetimes.
Jupiter's moons, Io, Europa, Ganymede, and Callisto show a bit more promise for actual life, but once again, that is way down the line.
Saturn's air is mostly hydrogen, and going out that far, you're likely to never see any man missions landing anyways. Saturn is a least 5 years away from Earth.
Saturn does have a huge moon called Titan, which is bigger than Mercury, which may be the single most sustainable place to live in the solar system outside of the Earth. It has a consistent atmosphere and temperature to support a base/colony, and the moon itself is very young, relatively speaking.
Uranus, Neptune, and Pluto are all similar. Sure, you could land there if you wanted. By why would you want to outside of potential gas farming on planets such as Neptune? Outside of Mars, Titan, our Moon, and potentially one of Jupiter's moons, I'm pretty sure the human race is staying put on Earth.