How to get to Batuu?

So how do I get to Batuu in the first place? It seems we can't make our already created sims to travel there because I can't seem to find out how to do it. Only by going into manage worlds, then I click on the "sun" icon i think it is? Called destination worlds and click on Batuu and can go from there but only new created sims can go? I can't figure out how to go there from the computer.