The Legacy Challenge Mega Thread

Yes I did see the rules around having to send your heir to university along with any other children who go. My question was more around gameplay than rules I think (maybe this isn't the right thread?). I have the MCCC for story progression outside of my legacy sims, so I'm not sure if/how I could play both my original founder and my heir at university at the same time without missing a bunch of time for each. I wanted to get my founder to the top of the scientist career but it requires active gameplay from what I can gather (I've never had a promotion when I've just sent her to work).