So if she can't max the 401K ($19.5K for 2021) right out the gate, then she could take a portion of this money and live off it thus allowing her to max the 401K in the short term. Maybe that is not a concern and the job pays plenty for doing the 401K to the full extent and also to live off of.
She might consider creating an account here and posting a case study with much more detail - there are many folks willing to help in-depth on this forum, and she would certainly get a much more comprehensive look at the whole picture that way.
Roth + taxable account (VTSAX in both) is certainly reasonable general advise, but everyone's situation is unique.