In five seconds, Amara Whittaker will be leaving the known multiverse.
The important word in that sentence is "known" — the exploration team is still going to a part of the multiverse. Even if their transport goes awry somehow the 4th-level aethernautics practitioner standing by the edge of the banishing circle will pull them back before the Void eats away too many of their extremities. But the banishing circle is totally targeting a world with survivable gravity, breathable atmosphere, and broadly compatible laws of physics.
Because, in four seconds now, Amara Whittaker will be leaving the known multiverse for the first time.
The exploration coordinators always try to give people a relatively easy one for their first first-contact mission. Amara will almost certainly not end up in any more danger at her destination than she is standing in the shimmery blue dome on the far side of the moon.
Three seconds before Amara Whittaker will be leaving the known multiverse, she does a last habitual check of her equipment.
Form-fitting tactical undersuit that always reminds her of a one-piece bathing suit: check. Belt covered in pouches full of equipment: check. Magical recall beacon mounted to an armband on her flesh-and-blood arm: check. Enchanted earrings, runic bracelets: check. Light, flowery sundress because she is not yet used to walking around in just her form-fitting tactical undersuit: check.
In two seconds, Amara Whittaker will be leaving the known multiverse, and she is so excited!
So what if she can never go back and finish her degree, because half of her (mostly the right half, but she still has two normal hands, thank goodness) is made out of water, now? So what if she has barely had any time to study actual magic beyond what comes to her instinctively? She's off to see the wonders of the world — to boldly go where no witch has gone before.
In one second, Amara Whittaker will be leaving the known multiverse and beginning the rest of her life.
Then Kasey, the banishing circle technician, starts to say "Huh, that's funny—"
There is a flash of argent light and a sensation like performing a limbo in a direction perpendicular to reality, and Amara Whittaker is somewhere else.