Moving out of mutual funds sanity check

My girlfriend (37) has $240k in proprietary mutual funds through Principal. They’re very conservative and she wants to put that money to work. Here’s our plan: Sell all the mutual funds, transfer that cash to a brokerage account with Fidelity, start maxing her employer 401k for 3 years and use the fidelity brokerage account to offset, start maxing her Roth IRA for 3 years and use the brokerage account to offset, then finally with the remainder brokerage amount DCA into FXAIX and the Fidelity 205