I think Lois did hers at the Planet in the real canon.
Not that it matters, but this is what we know from the show. In TPvLL the hologram of Perry states* (and nobody objects) that she started at the Planet as a research assistant between '86 and '88 (she would have been 19-21 years old at the time, so this would have been during college or right after if she graduated a bit early). I'm assuming she worked and went to college at the same time. Maybe she started out as an intern and got hired as a research assistant.
Another interesting bit of canon that may come in handy for everyone involved in this project (assuming you care
), is that Lois got her first Kerth in 1991.
*At least he does so according to the script. I don't have the episode handy right now, so I can't check to make sure.
